[2cbf1af] | 1 | // Copyright (c) 2004-2011 Sergey Lyubka |
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| 2 | // |
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| 3 | // Permission is hereby granted, free of charge, to any person obtaining a copy |
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| 4 | // of this software and associated documentation files (the "Software"), to deal |
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| 5 | // in the Software without restriction, including without limitation the rights |
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| 6 | // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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| 7 | // copies of the Software, and to permit persons to whom the Software is |
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| 8 | // furnished to do so, subject to the following conditions: |
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| 9 | // |
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| 10 | // The above copyright notice and this permission notice shall be included in |
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| 11 | // all copies or substantial portions of the Software. |
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| 12 | // |
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| 13 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 14 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 15 | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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| 16 | // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 17 | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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| 18 | // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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| 19 | // THE SOFTWARE. |
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| 20 | |
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| 21 | #if HAVE_CONFIG_H |
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| 22 | #include "config.h" |
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| 23 | #endif |
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| 24 | |
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| 25 | #if defined(__rtems__) |
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| 26 | #include <md5.h> |
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| 27 | #define HAVE_MD5 |
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| 28 | #endif // __rtems__ |
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| 29 | |
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| 30 | #if defined(_WIN32) |
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| 31 | #define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005 |
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| 32 | #else |
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| 33 | #define _XOPEN_SOURCE 600 // For flockfile() on Linux |
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| 34 | #define _LARGEFILE_SOURCE // Enable 64-bit file offsets |
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| 35 | #define __STDC_FORMAT_MACROS // <inttypes.h> wants this for C++ |
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| 36 | #define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX |
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| 37 | #endif |
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| 38 | |
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| 39 | #if defined(__SYMBIAN32__) |
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| 40 | #define NO_SSL // SSL is not supported |
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| 41 | #define NO_CGI // CGI is not supported |
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| 42 | #define PATH_MAX FILENAME_MAX |
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| 43 | #endif // __SYMBIAN32__ |
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| 44 | |
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| 45 | #ifndef _WIN32_WCE // Some ANSI #includes are not available on Windows CE |
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| 46 | #include <sys/types.h> |
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| 47 | #include <sys/stat.h> |
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| 48 | #include <errno.h> |
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| 49 | #include <signal.h> |
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| 50 | #include <fcntl.h> |
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| 51 | #endif // !_WIN32_WCE |
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| 52 | |
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| 53 | #include <time.h> |
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| 54 | #include <stdlib.h> |
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| 55 | #include <stdarg.h> |
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| 56 | #include <assert.h> |
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| 57 | #include <string.h> |
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| 58 | #include <ctype.h> |
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| 59 | #include <limits.h> |
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| 60 | #include <stddef.h> |
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| 61 | #include <stdio.h> |
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| 62 | |
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| 63 | #if defined(_WIN32) && !defined(__SYMBIAN32__) // Windows specific |
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| 64 | #define _WIN32_WINNT 0x0400 // To make it link in VS2005 |
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| 65 | #include <windows.h> |
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| 66 | |
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| 67 | #ifndef PATH_MAX |
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| 68 | #define PATH_MAX MAX_PATH |
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| 69 | #endif |
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| 70 | |
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| 71 | #ifndef _WIN32_WCE |
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| 72 | #include <process.h> |
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| 73 | #include <direct.h> |
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| 74 | #include <io.h> |
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| 75 | #else // _WIN32_WCE |
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| 76 | #include <winsock2.h> |
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| 77 | #include <ws2tcpip.h> |
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| 78 | #define NO_CGI // WinCE has no pipes |
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| 79 | |
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| 80 | typedef long off_t; |
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| 81 | #define BUFSIZ 4096 |
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| 82 | |
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| 83 | #define errno GetLastError() |
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| 84 | #define strerror(x) _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10) |
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| 85 | #endif // _WIN32_WCE |
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| 86 | |
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| 87 | #define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \ |
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| 88 | ((uint64_t)((uint32_t)(hi))) << 32)) |
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| 89 | #define RATE_DIFF 10000000 // 100 nsecs |
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| 90 | #define EPOCH_DIFF MAKEUQUAD(0xd53e8000, 0x019db1de) |
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| 91 | #define SYS2UNIX_TIME(lo, hi) \ |
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| 92 | (time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF) |
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| 93 | |
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| 94 | // Visual Studio 6 does not know __func__ or __FUNCTION__ |
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| 95 | // The rest of MS compilers use __FUNCTION__, not C99 __func__ |
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| 96 | // Also use _strtoui64 on modern M$ compilers |
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| 97 | #if defined(_MSC_VER) && _MSC_VER < 1300 |
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| 98 | #define STRX(x) #x |
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| 99 | #define STR(x) STRX(x) |
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| 100 | #define __func__ "line " STR(__LINE__) |
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| 101 | #define strtoull(x, y, z) strtoul(x, y, z) |
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| 102 | #define strtoll(x, y, z) strtol(x, y, z) |
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| 103 | #else |
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| 104 | #define __func__ __FUNCTION__ |
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| 105 | #define strtoull(x, y, z) _strtoui64(x, y, z) |
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| 106 | #define strtoll(x, y, z) _strtoi64(x, y, z) |
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| 107 | #endif // _MSC_VER |
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| 108 | |
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| 109 | #define ERRNO GetLastError() |
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| 110 | #define NO_SOCKLEN_T |
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| 111 | #define SSL_LIB "ssleay32.dll" |
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| 112 | #define CRYPTO_LIB "libeay32.dll" |
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| 113 | #define DIRSEP '\\' |
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| 114 | #define IS_DIRSEP_CHAR(c) ((c) == '/' || (c) == '\\') |
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| 115 | #define O_NONBLOCK 0 |
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| 116 | #if !defined(EWOULDBLOCK) |
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| 117 | #define EWOULDBLOCK WSAEWOULDBLOCK |
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| 118 | #endif // !EWOULDBLOCK |
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| 119 | #define _POSIX_ |
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| 120 | #define INT64_FMT "I64d" |
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| 121 | |
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| 122 | #define WINCDECL __cdecl |
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| 123 | #define SHUT_WR 1 |
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| 124 | #define snprintf _snprintf |
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| 125 | #define vsnprintf _vsnprintf |
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| 126 | #define mg_sleep(x) Sleep(x) |
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| 127 | |
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| 128 | #define pipe(x) _pipe(x, BUFSIZ, _O_BINARY) |
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| 129 | #define popen(x, y) _popen(x, y) |
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| 130 | #define pclose(x) _pclose(x) |
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| 131 | #define close(x) _close(x) |
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| 132 | #define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y)) |
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| 133 | #define RTLD_LAZY 0 |
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| 134 | #define fseeko(x, y, z) fseek((x), (y), (z)) |
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| 135 | #define fdopen(x, y) _fdopen((x), (y)) |
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| 136 | #define write(x, y, z) _write((x), (y), (unsigned) z) |
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| 137 | #define read(x, y, z) _read((x), (y), (unsigned) z) |
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| 138 | #define flockfile(x) EnterCriticalSection(&global_log_file_lock) |
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| 139 | #define funlockfile(x) LeaveCriticalSection(&global_log_file_lock) |
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| 140 | |
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| 141 | #if !defined(fileno) |
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| 142 | #define fileno(x) _fileno(x) |
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| 143 | #endif // !fileno MINGW #defines fileno |
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| 144 | |
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| 145 | typedef HANDLE pthread_mutex_t; |
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| 146 | typedef struct {HANDLE signal, broadcast;} pthread_cond_t; |
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| 147 | typedef DWORD pthread_t; |
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| 148 | #define pid_t HANDLE // MINGW typedefs pid_t to int. Using #define here. |
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| 149 | |
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| 150 | struct timespec { |
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| 151 | long tv_nsec; |
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| 152 | long tv_sec; |
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| 153 | }; |
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| 154 | |
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| 155 | static int pthread_mutex_lock(pthread_mutex_t *); |
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| 156 | static int pthread_mutex_unlock(pthread_mutex_t *); |
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| 157 | static FILE *mg_fopen(const char *path, const char *mode); |
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| 158 | |
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| 159 | #if defined(HAVE_STDINT) |
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| 160 | #include <stdint.h> |
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| 161 | #else |
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| 162 | typedef unsigned int uint32_t; |
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| 163 | typedef unsigned short uint16_t; |
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| 164 | typedef unsigned __int64 uint64_t; |
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| 165 | typedef __int64 int64_t; |
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| 166 | #define INT64_MAX 9223372036854775807 |
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| 167 | #endif // HAVE_STDINT |
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| 168 | |
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| 169 | // POSIX dirent interface |
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| 170 | struct dirent { |
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| 171 | char d_name[PATH_MAX]; |
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| 172 | }; |
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| 173 | |
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| 174 | typedef struct DIR { |
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| 175 | HANDLE handle; |
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| 176 | WIN32_FIND_DATAW info; |
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| 177 | struct dirent result; |
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| 178 | } DIR; |
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| 179 | |
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| 180 | #else // UNIX specific |
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| 181 | #include <sys/wait.h> |
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| 182 | #include <sys/socket.h> |
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| 183 | #include <sys/select.h> |
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| 184 | #include <netinet/in.h> |
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| 185 | #include <arpa/inet.h> |
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| 186 | #include <sys/time.h> |
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| 187 | #include <stdint.h> |
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| 188 | #include <inttypes.h> |
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| 189 | #include <netdb.h> |
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| 190 | |
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| 191 | #include <pwd.h> |
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| 192 | #include <unistd.h> |
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| 193 | #include <dirent.h> |
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| 194 | #if !defined(NO_SSL_DL) && !defined(NO_SSL) |
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| 195 | #include <dlfcn.h> |
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| 196 | #endif |
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| 197 | #include <pthread.h> |
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| 198 | #if defined(__MACH__) |
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| 199 | #define SSL_LIB "libssl.dylib" |
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| 200 | #define CRYPTO_LIB "libcrypto.dylib" |
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| 201 | #else |
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| 202 | #if !defined(SSL_LIB) |
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| 203 | #define SSL_LIB "libssl.so" |
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| 204 | #endif |
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| 205 | #if !defined(CRYPTO_LIB) |
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| 206 | #define CRYPTO_LIB "libcrypto.so" |
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| 207 | #endif |
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| 208 | #endif |
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| 209 | #define DIRSEP '/' |
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| 210 | #define IS_DIRSEP_CHAR(c) ((c) == '/') |
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| 211 | #ifndef O_BINARY |
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| 212 | #define O_BINARY 0 |
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| 213 | #endif // O_BINARY |
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| 214 | #define closesocket(a) close(a) |
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| 215 | #define mg_fopen(x, y) fopen(x, y) |
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| 216 | #define mg_mkdir(x, y) mkdir(x, y) |
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| 217 | #define mg_remove(x) remove(x) |
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| 218 | #define mg_rename(x, y) rename(x, y) |
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| 219 | #define mg_sleep(x) usleep((x) * 1000) |
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| 220 | #define ERRNO errno |
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| 221 | #define INVALID_SOCKET (-1) |
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| 222 | #define INT64_FMT PRId64 |
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| 223 | typedef int SOCKET; |
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| 224 | #define WINCDECL |
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| 225 | |
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| 226 | #endif // End of Windows and UNIX specific includes |
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| 227 | |
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| 228 | #include "mongoose.h" |
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| 229 | |
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| 230 | #define MONGOOSE_VERSION "3.2" |
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| 231 | #define PASSWORDS_FILE_NAME ".htpasswd" |
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| 232 | #define CGI_ENVIRONMENT_SIZE 4096 |
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| 233 | #define MAX_CGI_ENVIR_VARS 64 |
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| 234 | #define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0])) |
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| 235 | |
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| 236 | #ifdef _WIN32 |
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| 237 | static CRITICAL_SECTION global_log_file_lock; |
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| 238 | static pthread_t pthread_self(void) { |
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| 239 | return GetCurrentThreadId(); |
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| 240 | } |
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| 241 | #endif // _WIN32 |
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| 242 | |
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| 243 | #if defined(DEBUG) |
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| 244 | #define DEBUG_TRACE(x) do { \ |
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| 245 | flockfile(stdout); \ |
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| 246 | printf("*** %lu.%p.%s.%d: ", \ |
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| 247 | (unsigned long) time(NULL), (void *) pthread_self(), \ |
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| 248 | __func__, __LINE__); \ |
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| 249 | printf x; \ |
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| 250 | putchar('\n'); \ |
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| 251 | fflush(stdout); \ |
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| 252 | funlockfile(stdout); \ |
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| 253 | } while (0) |
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| 254 | #else |
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| 255 | #define DEBUG_TRACE(x) |
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| 256 | #endif // DEBUG |
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| 257 | |
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| 258 | // Darwin prior to 7.0 and Win32 do not have socklen_t |
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| 259 | #ifdef NO_SOCKLEN_T |
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| 260 | typedef int socklen_t; |
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| 261 | #endif // NO_SOCKLEN_T |
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| 262 | |
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| 263 | #if !defined(MSG_NOSIGNAL) |
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| 264 | #define MSG_NOSIGNAL 0 |
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| 265 | #endif |
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| 266 | |
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| 267 | typedef void * (*mg_thread_func_t)(void *); |
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| 268 | |
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| 269 | static const char *http_500_error = "Internal Server Error"; |
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| 270 | |
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| 271 | // Snatched from OpenSSL includes. I put the prototypes here to be independent |
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| 272 | // from the OpenSSL source installation. Having this, mongoose + SSL can be |
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| 273 | // built on any system with binary SSL libraries installed. |
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| 274 | typedef struct ssl_st SSL; |
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| 275 | typedef struct ssl_method_st SSL_METHOD; |
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| 276 | typedef struct ssl_ctx_st SSL_CTX; |
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| 277 | |
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| 278 | #define SSL_ERROR_WANT_READ 2 |
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| 279 | #define SSL_ERROR_WANT_WRITE 3 |
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| 280 | #define SSL_FILETYPE_PEM 1 |
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| 281 | #define CRYPTO_LOCK 1 |
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| 282 | |
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| 283 | #if defined(NO_SSL_DL) |
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| 284 | extern void SSL_free(SSL *); |
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| 285 | extern int SSL_accept(SSL *); |
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| 286 | extern int SSL_connect(SSL *); |
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| 287 | extern int SSL_read(SSL *, void *, int); |
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| 288 | extern int SSL_write(SSL *, const void *, int); |
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| 289 | extern int SSL_get_error(const SSL *, int); |
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| 290 | extern int SSL_set_fd(SSL *, int); |
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| 291 | extern SSL *SSL_new(SSL_CTX *); |
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| 292 | extern SSL_CTX *SSL_CTX_new(SSL_METHOD *); |
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| 293 | extern SSL_METHOD *SSLv23_server_method(void); |
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| 294 | extern int SSL_library_init(void); |
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| 295 | extern void SSL_load_error_strings(void); |
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| 296 | extern int SSL_CTX_use_PrivateKey_file(SSL_CTX *, const char *, int); |
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| 297 | extern int SSL_CTX_use_certificate_file(SSL_CTX *, const char *, int); |
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| 298 | extern int SSL_CTX_use_certificate_chain_file(SSL_CTX *, const char *); |
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| 299 | extern void SSL_CTX_set_default_passwd_cb(SSL_CTX *, mg_callback_t); |
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| 300 | extern void SSL_CTX_free(SSL_CTX *); |
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| 301 | extern unsigned long ERR_get_error(void); |
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| 302 | extern char *ERR_error_string(unsigned long, char *); |
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| 303 | extern int CRYPTO_num_locks(void); |
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| 304 | extern void CRYPTO_set_locking_callback(void (*)(int, int, const char *, int)); |
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| 305 | extern void CRYPTO_set_id_callback(unsigned long (*)(void)); |
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| 306 | #else |
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| 307 | // Dynamically loaded SSL functionality |
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| 308 | struct ssl_func { |
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| 309 | const char *name; // SSL function name |
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| 310 | void (*ptr)(void); // Function pointer |
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| 311 | }; |
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| 312 | |
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| 313 | #define SSL_free (* (void (*)(SSL *)) ssl_sw[0].ptr) |
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| 314 | #define SSL_accept (* (int (*)(SSL *)) ssl_sw[1].ptr) |
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| 315 | #define SSL_connect (* (int (*)(SSL *)) ssl_sw[2].ptr) |
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| 316 | #define SSL_read (* (int (*)(SSL *, void *, int)) ssl_sw[3].ptr) |
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| 317 | #define SSL_write (* (int (*)(SSL *, const void *,int)) ssl_sw[4].ptr) |
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| 318 | #define SSL_get_error (* (int (*)(SSL *, int)) ssl_sw[5].ptr) |
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| 319 | #define SSL_set_fd (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr) |
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| 320 | #define SSL_new (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr) |
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| 321 | #define SSL_CTX_new (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr) |
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| 322 | #define SSLv23_server_method (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr) |
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| 323 | #define SSL_library_init (* (int (*)(void)) ssl_sw[10].ptr) |
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| 324 | #define SSL_CTX_use_PrivateKey_file (* (int (*)(SSL_CTX *, \ |
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| 325 | const char *, int)) ssl_sw[11].ptr) |
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| 326 | #define SSL_CTX_use_certificate_file (* (int (*)(SSL_CTX *, \ |
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| 327 | const char *, int)) ssl_sw[12].ptr) |
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| 328 | #define SSL_CTX_set_default_passwd_cb \ |
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| 329 | (* (void (*)(SSL_CTX *, mg_callback_t)) ssl_sw[13].ptr) |
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| 330 | #define SSL_CTX_free (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr) |
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| 331 | #define SSL_load_error_strings (* (void (*)(void)) ssl_sw[15].ptr) |
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| 332 | #define SSL_CTX_use_certificate_chain_file \ |
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| 333 | (* (int (*)(SSL_CTX *, const char *)) ssl_sw[16].ptr) |
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| 334 | |
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| 335 | #define CRYPTO_num_locks (* (int (*)(void)) crypto_sw[0].ptr) |
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| 336 | #define CRYPTO_set_locking_callback \ |
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| 337 | (* (void (*)(void (*)(int, int, const char *, int))) crypto_sw[1].ptr) |
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| 338 | #define CRYPTO_set_id_callback \ |
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| 339 | (* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr) |
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| 340 | #define ERR_get_error (* (unsigned long (*)(void)) crypto_sw[3].ptr) |
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| 341 | #define ERR_error_string (* (char * (*)(unsigned long,char *)) crypto_sw[4].ptr) |
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| 342 | |
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| 343 | // set_ssl_option() function updates this array. |
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| 344 | // It loads SSL library dynamically and changes NULLs to the actual addresses |
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| 345 | // of respective functions. The macros above (like SSL_connect()) are really |
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| 346 | // just calling these functions indirectly via the pointer. |
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| 347 | static struct ssl_func ssl_sw[] = { |
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| 348 | {"SSL_free", NULL}, |
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| 349 | {"SSL_accept", NULL}, |
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| 350 | {"SSL_connect", NULL}, |
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| 351 | {"SSL_read", NULL}, |
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| 352 | {"SSL_write", NULL}, |
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| 353 | {"SSL_get_error", NULL}, |
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| 354 | {"SSL_set_fd", NULL}, |
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| 355 | {"SSL_new", NULL}, |
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| 356 | {"SSL_CTX_new", NULL}, |
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| 357 | {"SSLv23_server_method", NULL}, |
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| 358 | {"SSL_library_init", NULL}, |
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| 359 | {"SSL_CTX_use_PrivateKey_file", NULL}, |
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| 360 | {"SSL_CTX_use_certificate_file",NULL}, |
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| 361 | {"SSL_CTX_set_default_passwd_cb",NULL}, |
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| 362 | {"SSL_CTX_free", NULL}, |
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| 363 | {"SSL_load_error_strings", NULL}, |
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| 364 | {"SSL_CTX_use_certificate_chain_file", NULL}, |
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| 365 | {NULL, NULL} |
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| 366 | }; |
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| 367 | |
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| 368 | // Similar array as ssl_sw. These functions could be located in different lib. |
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| 369 | #if !defined(NO_SSL) |
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| 370 | static struct ssl_func crypto_sw[] = { |
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| 371 | {"CRYPTO_num_locks", NULL}, |
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| 372 | {"CRYPTO_set_locking_callback", NULL}, |
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| 373 | {"CRYPTO_set_id_callback", NULL}, |
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| 374 | {"ERR_get_error", NULL}, |
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| 375 | {"ERR_error_string", NULL}, |
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| 376 | {NULL, NULL} |
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| 377 | }; |
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| 378 | #endif // NO_SSL |
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| 379 | #endif // NO_SSL_DL |
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| 380 | |
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| 381 | static const char *month_names[] = { |
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| 382 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
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| 383 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
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| 384 | }; |
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| 385 | |
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| 386 | // Unified socket address. For IPv6 support, add IPv6 address structure |
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| 387 | // in the union u. |
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| 388 | union usa { |
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| 389 | struct sockaddr sa; |
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| 390 | struct sockaddr_in sin; |
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| 391 | #if defined(USE_IPV6) |
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| 392 | struct sockaddr_in6 sin6; |
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| 393 | #endif |
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| 394 | }; |
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| 395 | |
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| 396 | // Describes a string (chunk of memory). |
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| 397 | struct vec { |
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| 398 | const char *ptr; |
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| 399 | size_t len; |
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| 400 | }; |
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| 401 | |
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| 402 | // Structure used by mg_stat() function. Uses 64 bit file length. |
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| 403 | struct mgstat { |
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| 404 | int is_directory; // Directory marker |
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| 405 | int64_t size; // File size |
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| 406 | time_t mtime; // Modification time |
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| 407 | }; |
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| 408 | |
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| 409 | // Describes listening socket, or socket which was accept()-ed by the master |
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| 410 | // thread and queued for future handling by the worker thread. |
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| 411 | struct socket { |
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| 412 | struct socket *next; // Linkage |
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| 413 | SOCKET sock; // Listening socket |
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| 414 | union usa lsa; // Local socket address |
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| 415 | union usa rsa; // Remote socket address |
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| 416 | int is_ssl; // Is socket SSL-ed |
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| 417 | }; |
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| 418 | |
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| 419 | enum { |
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| 420 | CGI_EXTENSIONS, CGI_ENVIRONMENT, PUT_DELETE_PASSWORDS_FILE, CGI_INTERPRETER, |
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| 421 | PROTECT_URI, AUTHENTICATION_DOMAIN, SSI_EXTENSIONS, ACCESS_LOG_FILE, |
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| 422 | SSL_CHAIN_FILE, ENABLE_DIRECTORY_LISTING, ERROR_LOG_FILE, |
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| 423 | GLOBAL_PASSWORDS_FILE, INDEX_FILES, |
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| 424 | ENABLE_KEEP_ALIVE, ACCESS_CONTROL_LIST, MAX_REQUEST_SIZE, |
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| 425 | EXTRA_MIME_TYPES, LISTENING_PORTS, |
---|
| 426 | DOCUMENT_ROOT, SSL_CERTIFICATE, NUM_THREADS, RUN_AS_USER, REWRITE, |
---|
| 427 | THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_POLICY, |
---|
| 428 | NUM_OPTIONS |
---|
| 429 | }; |
---|
| 430 | |
---|
| 431 | static const char *config_options[] = { |
---|
| 432 | "C", "cgi_pattern", "**.cgi$|**.pl$|**.php$", |
---|
| 433 | "E", "cgi_environment", NULL, |
---|
| 434 | "G", "put_delete_passwords_file", NULL, |
---|
| 435 | "I", "cgi_interpreter", NULL, |
---|
| 436 | "P", "protect_uri", NULL, |
---|
| 437 | "R", "authentication_domain", "mydomain.com", |
---|
| 438 | "S", "ssi_pattern", "**.shtml$|**.shtm$", |
---|
| 439 | "a", "access_log_file", NULL, |
---|
| 440 | "c", "ssl_chain_file", NULL, |
---|
| 441 | "d", "enable_directory_listing", "yes", |
---|
| 442 | "e", "error_log_file", NULL, |
---|
| 443 | "g", "global_passwords_file", NULL, |
---|
| 444 | "i", "index_files", "index.html,index.htm,index.cgi,index.shtml,index.php", |
---|
| 445 | "k", "enable_keep_alive", "no", |
---|
| 446 | "l", "access_control_list", NULL, |
---|
| 447 | "M", "max_request_size", "16384", |
---|
| 448 | "m", "extra_mime_types", NULL, |
---|
| 449 | "p", "listening_ports", "8080", |
---|
| 450 | "r", "document_root", ".", |
---|
| 451 | "s", "ssl_certificate", NULL, |
---|
| 452 | "t", "num_threads", "10", |
---|
| 453 | "u", "run_as_user", NULL, |
---|
| 454 | "w", "url_rewrite_patterns", NULL, |
---|
| 455 | "x", "thread_stack_size", NULL, |
---|
| 456 | "y", "thread_priority", NULL, |
---|
| 457 | "z", "thread_policy", NULL, |
---|
| 458 | NULL |
---|
| 459 | }; |
---|
| 460 | #define ENTRIES_PER_CONFIG_OPTION 3 |
---|
| 461 | |
---|
| 462 | struct mg_context { |
---|
| 463 | volatile int stop_flag; // Should we stop event loop |
---|
| 464 | SSL_CTX *ssl_ctx; // SSL context |
---|
| 465 | char *config[NUM_OPTIONS]; // Mongoose configuration parameters |
---|
| 466 | mg_callback_t user_callback; // User-defined callback function |
---|
| 467 | void *user_data; // User-defined data |
---|
| 468 | |
---|
| 469 | struct socket *listening_sockets; |
---|
| 470 | |
---|
| 471 | volatile int num_threads; // Number of threads |
---|
| 472 | pthread_mutex_t mutex; // Protects (max|num)_threads |
---|
| 473 | pthread_cond_t cond; // Condvar for tracking workers terminations |
---|
| 474 | |
---|
| 475 | struct socket queue[20]; // Accepted sockets |
---|
| 476 | volatile int sq_head; // Head of the socket queue |
---|
| 477 | volatile int sq_tail; // Tail of the socket queue |
---|
| 478 | pthread_cond_t sq_full; // Singaled when socket is produced |
---|
| 479 | pthread_cond_t sq_empty; // Signaled when socket is consumed |
---|
| 480 | }; |
---|
| 481 | |
---|
| 482 | struct mg_connection { |
---|
| 483 | struct mg_request_info request_info; |
---|
| 484 | struct mg_context *ctx; |
---|
| 485 | SSL *ssl; // SSL descriptor |
---|
| 486 | struct socket client; // Connected client |
---|
| 487 | time_t birth_time; // Time connection was accepted |
---|
| 488 | int64_t num_bytes_sent; // Total bytes sent to client |
---|
| 489 | int64_t content_len; // Content-Length header value |
---|
| 490 | int64_t consumed_content; // How many bytes of content is already read |
---|
| 491 | char *buf; // Buffer for received data |
---|
| 492 | char *path_info; // PATH_INFO part of the URL |
---|
| 493 | int must_close; // 1 if connection must be closed |
---|
| 494 | int buf_size; // Buffer size |
---|
| 495 | int request_len; // Size of the request + headers in a buffer |
---|
| 496 | int data_len; // Total size of data in a buffer |
---|
| 497 | }; |
---|
| 498 | |
---|
| 499 | const char **mg_get_valid_option_names(void) { |
---|
| 500 | return config_options; |
---|
| 501 | } |
---|
| 502 | |
---|
| 503 | static void *call_user(struct mg_connection *conn, enum mg_event event) { |
---|
| 504 | conn->request_info.user_data = conn->ctx->user_data; |
---|
| 505 | return conn->ctx->user_callback == NULL ? NULL : |
---|
| 506 | conn->ctx->user_callback(event, conn, &conn->request_info); |
---|
| 507 | } |
---|
| 508 | |
---|
| 509 | static int get_option_index(const char *name) { |
---|
| 510 | int i; |
---|
| 511 | |
---|
| 512 | for (i = 0; config_options[i] != NULL; i += ENTRIES_PER_CONFIG_OPTION) { |
---|
| 513 | if (strcmp(config_options[i], name) == 0 || |
---|
| 514 | strcmp(config_options[i + 1], name) == 0) { |
---|
| 515 | return i / ENTRIES_PER_CONFIG_OPTION; |
---|
| 516 | } |
---|
| 517 | } |
---|
| 518 | return -1; |
---|
| 519 | } |
---|
| 520 | |
---|
| 521 | const char *mg_get_option(const struct mg_context *ctx, const char *name) { |
---|
| 522 | int i; |
---|
| 523 | if ((i = get_option_index(name)) == -1) { |
---|
| 524 | return NULL; |
---|
| 525 | } else if (ctx->config[i] == NULL) { |
---|
| 526 | return ""; |
---|
| 527 | } else { |
---|
| 528 | return ctx->config[i]; |
---|
| 529 | } |
---|
| 530 | } |
---|
| 531 | |
---|
| 532 | static void sockaddr_to_string(char *buf, size_t len, |
---|
| 533 | const union usa *usa) { |
---|
| 534 | buf[0] = '\0'; |
---|
| 535 | #if defined(USE_IPV6) |
---|
| 536 | inet_ntop(usa->sa.sa_family, usa->sa.sa_family == AF_INET ? |
---|
| 537 | (void *) &usa->sin.sin_addr : |
---|
| 538 | (void *) &usa->sin6.sin6_addr, buf, len); |
---|
| 539 | #elif defined(_WIN32) |
---|
| 540 | // Only Windoze Vista (and newer) have inet_ntop() |
---|
| 541 | strncpy(buf, inet_ntoa(usa->sin.sin_addr), len); |
---|
| 542 | #else |
---|
| 543 | inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len); |
---|
| 544 | #endif |
---|
| 545 | } |
---|
| 546 | |
---|
| 547 | // Print error message to the opened error log stream. |
---|
| 548 | static void cry(struct mg_connection *conn, const char *fmt, ...) { |
---|
| 549 | char buf[BUFSIZ], src_addr[20]; |
---|
| 550 | va_list ap; |
---|
| 551 | FILE *fp; |
---|
| 552 | time_t timestamp; |
---|
| 553 | |
---|
| 554 | va_start(ap, fmt); |
---|
| 555 | (void) vsnprintf(buf, sizeof(buf), fmt, ap); |
---|
| 556 | va_end(ap); |
---|
| 557 | |
---|
| 558 | // Do not lock when getting the callback value, here and below. |
---|
| 559 | // I suppose this is fine, since function cannot disappear in the |
---|
| 560 | // same way string option can. |
---|
| 561 | conn->request_info.log_message = buf; |
---|
| 562 | if (call_user(conn, MG_EVENT_LOG) == NULL) { |
---|
| 563 | fp = conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL : |
---|
| 564 | mg_fopen(conn->ctx->config[ERROR_LOG_FILE], "a+"); |
---|
| 565 | |
---|
| 566 | if (fp != NULL) { |
---|
| 567 | flockfile(fp); |
---|
| 568 | timestamp = time(NULL); |
---|
| 569 | |
---|
| 570 | sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); |
---|
| 571 | fprintf(fp, "[%010lu] [error] [client %s] ", (unsigned long) timestamp, |
---|
| 572 | src_addr); |
---|
| 573 | |
---|
| 574 | if (conn->request_info.request_method != NULL) { |
---|
| 575 | fprintf(fp, "%s %s: ", conn->request_info.request_method, |
---|
| 576 | conn->request_info.uri); |
---|
| 577 | } |
---|
| 578 | |
---|
| 579 | (void) fprintf(fp, "%s", buf); |
---|
| 580 | fputc('\n', fp); |
---|
| 581 | funlockfile(fp); |
---|
| 582 | if (fp != stderr) { |
---|
| 583 | fclose(fp); |
---|
| 584 | } |
---|
| 585 | } |
---|
| 586 | } |
---|
| 587 | conn->request_info.log_message = NULL; |
---|
| 588 | } |
---|
| 589 | |
---|
| 590 | // Return fake connection structure. Used for logging, if connection |
---|
| 591 | // is not applicable at the moment of logging. |
---|
| 592 | static struct mg_connection *fc(struct mg_context *ctx) { |
---|
| 593 | static struct mg_connection fake_connection; |
---|
| 594 | fake_connection.ctx = ctx; |
---|
| 595 | return &fake_connection; |
---|
| 596 | } |
---|
| 597 | |
---|
| 598 | const char *mg_version(void) { |
---|
| 599 | return MONGOOSE_VERSION; |
---|
| 600 | } |
---|
| 601 | |
---|
| 602 | static void mg_strlcpy(register char *dst, register const char *src, size_t n) { |
---|
| 603 | for (; *src != '\0' && n > 1; n--) { |
---|
| 604 | *dst++ = *src++; |
---|
| 605 | } |
---|
| 606 | *dst = '\0'; |
---|
| 607 | } |
---|
| 608 | |
---|
| 609 | static int lowercase(const char *s) { |
---|
| 610 | return tolower(* (const unsigned char *) s); |
---|
| 611 | } |
---|
| 612 | |
---|
| 613 | static int mg_strncasecmp(const char *s1, const char *s2, size_t len) { |
---|
| 614 | int diff = 0; |
---|
| 615 | |
---|
| 616 | if (len > 0) |
---|
| 617 | do { |
---|
| 618 | diff = lowercase(s1++) - lowercase(s2++); |
---|
| 619 | } while (diff == 0 && s1[-1] != '\0' && --len > 0); |
---|
| 620 | |
---|
| 621 | return diff; |
---|
| 622 | } |
---|
| 623 | |
---|
| 624 | static int mg_strcasecmp(const char *s1, const char *s2) { |
---|
| 625 | int diff; |
---|
| 626 | |
---|
| 627 | do { |
---|
| 628 | diff = lowercase(s1++) - lowercase(s2++); |
---|
| 629 | } while (diff == 0 && s1[-1] != '\0'); |
---|
| 630 | |
---|
| 631 | return diff; |
---|
| 632 | } |
---|
| 633 | |
---|
| 634 | static char * mg_strndup(const char *ptr, size_t len) { |
---|
| 635 | char *p; |
---|
| 636 | |
---|
| 637 | if ((p = (char *) malloc(len + 1)) != NULL) { |
---|
| 638 | mg_strlcpy(p, ptr, len + 1); |
---|
| 639 | } |
---|
| 640 | |
---|
| 641 | return p; |
---|
| 642 | } |
---|
| 643 | |
---|
| 644 | static char * mg_strdup(const char *str) { |
---|
| 645 | return mg_strndup(str, strlen(str)); |
---|
| 646 | } |
---|
| 647 | |
---|
| 648 | // Like snprintf(), but never returns negative value, or the value |
---|
| 649 | // that is larger than a supplied buffer. |
---|
| 650 | // Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability |
---|
| 651 | // in his audit report. |
---|
| 652 | static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen, |
---|
| 653 | const char *fmt, va_list ap) { |
---|
| 654 | int n; |
---|
| 655 | |
---|
| 656 | if (buflen == 0) |
---|
| 657 | return 0; |
---|
| 658 | |
---|
| 659 | n = vsnprintf(buf, buflen, fmt, ap); |
---|
| 660 | |
---|
| 661 | if (n < 0) { |
---|
| 662 | cry(conn, "vsnprintf error"); |
---|
| 663 | n = 0; |
---|
| 664 | } else if (n >= (int) buflen) { |
---|
| 665 | cry(conn, "truncating vsnprintf buffer: [%.*s]", |
---|
| 666 | n > 200 ? 200 : n, buf); |
---|
| 667 | n = (int) buflen - 1; |
---|
| 668 | } |
---|
| 669 | buf[n] = '\0'; |
---|
| 670 | |
---|
| 671 | return n; |
---|
| 672 | } |
---|
| 673 | |
---|
| 674 | static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen, |
---|
| 675 | const char *fmt, ...) { |
---|
| 676 | va_list ap; |
---|
| 677 | int n; |
---|
| 678 | |
---|
| 679 | va_start(ap, fmt); |
---|
| 680 | n = mg_vsnprintf(conn, buf, buflen, fmt, ap); |
---|
| 681 | va_end(ap); |
---|
| 682 | |
---|
| 683 | return n; |
---|
| 684 | } |
---|
| 685 | |
---|
| 686 | // Skip the characters until one of the delimiters characters found. |
---|
| 687 | // 0-terminate resulting word. Skip the delimiter and following whitespaces if any. |
---|
| 688 | // Advance pointer to buffer to the next word. Return found 0-terminated word. |
---|
| 689 | // Delimiters can be quoted with quotechar. |
---|
| 690 | static char *skip_quoted(char **buf, const char *delimiters, const char *whitespace, char quotechar) { |
---|
| 691 | char *p, *begin_word, *end_word, *end_whitespace; |
---|
| 692 | |
---|
| 693 | begin_word = *buf; |
---|
| 694 | end_word = begin_word + strcspn(begin_word, delimiters); |
---|
| 695 | |
---|
| 696 | // Check for quotechar |
---|
| 697 | if (end_word > begin_word) { |
---|
| 698 | p = end_word - 1; |
---|
| 699 | while (*p == quotechar) { |
---|
| 700 | // If there is anything beyond end_word, copy it |
---|
| 701 | if (*end_word == '\0') { |
---|
| 702 | *p = '\0'; |
---|
| 703 | break; |
---|
| 704 | } else { |
---|
| 705 | size_t end_off = strcspn(end_word + 1, delimiters); |
---|
| 706 | memmove (p, end_word, end_off + 1); |
---|
| 707 | p += end_off; // p must correspond to end_word - 1 |
---|
| 708 | end_word += end_off + 1; |
---|
| 709 | } |
---|
| 710 | } |
---|
| 711 | for (p++; p < end_word; p++) { |
---|
| 712 | *p = '\0'; |
---|
| 713 | } |
---|
| 714 | } |
---|
| 715 | |
---|
| 716 | if (*end_word == '\0') { |
---|
| 717 | *buf = end_word; |
---|
| 718 | } else { |
---|
| 719 | end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace); |
---|
| 720 | |
---|
| 721 | for (p = end_word; p < end_whitespace; p++) { |
---|
| 722 | *p = '\0'; |
---|
| 723 | } |
---|
| 724 | |
---|
| 725 | *buf = end_whitespace; |
---|
| 726 | } |
---|
| 727 | |
---|
| 728 | return begin_word; |
---|
| 729 | } |
---|
| 730 | |
---|
| 731 | // Simplified version of skip_quoted without quote char |
---|
| 732 | // and whitespace == delimiters |
---|
| 733 | static char *skip(char **buf, const char *delimiters) { |
---|
| 734 | return skip_quoted(buf, delimiters, delimiters, 0); |
---|
| 735 | } |
---|
| 736 | |
---|
| 737 | |
---|
| 738 | // Return HTTP header value, or NULL if not found. |
---|
| 739 | static const char *get_header(const struct mg_request_info *ri, |
---|
| 740 | const char *name) { |
---|
| 741 | int i; |
---|
| 742 | |
---|
| 743 | for (i = 0; i < ri->num_headers; i++) |
---|
| 744 | if (!mg_strcasecmp(name, ri->http_headers[i].name)) |
---|
| 745 | return ri->http_headers[i].value; |
---|
| 746 | |
---|
| 747 | return NULL; |
---|
| 748 | } |
---|
| 749 | |
---|
| 750 | const char *mg_get_header(const struct mg_connection *conn, const char *name) { |
---|
| 751 | return get_header(&conn->request_info, name); |
---|
| 752 | } |
---|
| 753 | |
---|
| 754 | // A helper function for traversing comma separated list of values. |
---|
| 755 | // It returns a list pointer shifted to the next value, of NULL if the end |
---|
| 756 | // of the list found. |
---|
| 757 | // Value is stored in val vector. If value has form "x=y", then eq_val |
---|
| 758 | // vector is initialized to point to the "y" part, and val vector length |
---|
| 759 | // is adjusted to point only to "x". |
---|
| 760 | static const char *next_option(const char *list, struct vec *val, |
---|
| 761 | struct vec *eq_val) { |
---|
| 762 | if (list == NULL || *list == '\0') { |
---|
| 763 | // End of the list |
---|
| 764 | list = NULL; |
---|
| 765 | } else { |
---|
| 766 | val->ptr = list; |
---|
| 767 | if ((list = strchr(val->ptr, ',')) != NULL) { |
---|
| 768 | // Comma found. Store length and shift the list ptr |
---|
| 769 | val->len = list - val->ptr; |
---|
| 770 | list++; |
---|
| 771 | } else { |
---|
| 772 | // This value is the last one |
---|
| 773 | list = val->ptr + strlen(val->ptr); |
---|
| 774 | val->len = list - val->ptr; |
---|
| 775 | } |
---|
| 776 | |
---|
| 777 | if (eq_val != NULL) { |
---|
| 778 | // Value has form "x=y", adjust pointers and lengths |
---|
| 779 | // so that val points to "x", and eq_val points to "y". |
---|
| 780 | eq_val->len = 0; |
---|
| 781 | eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len); |
---|
| 782 | if (eq_val->ptr != NULL) { |
---|
| 783 | eq_val->ptr++; // Skip over '=' character |
---|
| 784 | eq_val->len = val->ptr + val->len - eq_val->ptr; |
---|
| 785 | val->len = (eq_val->ptr - val->ptr) - 1; |
---|
| 786 | } |
---|
| 787 | } |
---|
| 788 | } |
---|
| 789 | |
---|
| 790 | return list; |
---|
| 791 | } |
---|
| 792 | |
---|
| 793 | static int match_prefix(const char *pattern, int pattern_len, const char *str) { |
---|
| 794 | const char *or_str; |
---|
| 795 | int i, j, len, res; |
---|
| 796 | |
---|
| 797 | if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) { |
---|
| 798 | res = match_prefix(pattern, or_str - pattern, str); |
---|
| 799 | return res > 0 ? res : |
---|
| 800 | match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str); |
---|
| 801 | } |
---|
| 802 | |
---|
| 803 | i = j = 0; |
---|
| 804 | res = -1; |
---|
| 805 | for (; i < pattern_len; i++, j++) { |
---|
| 806 | if (pattern[i] == '?' && str[j] != '\0') { |
---|
| 807 | continue; |
---|
| 808 | } else if (pattern[i] == '$') { |
---|
| 809 | return str[j] == '\0' ? j : -1; |
---|
| 810 | } else if (pattern[i] == '*') { |
---|
| 811 | i++; |
---|
| 812 | if (pattern[i] == '*') { |
---|
| 813 | i++; |
---|
| 814 | len = strlen(str + j); |
---|
| 815 | } else { |
---|
| 816 | len = strcspn(str + j, "/"); |
---|
| 817 | } |
---|
| 818 | if (i == pattern_len) { |
---|
| 819 | return j + len; |
---|
| 820 | } |
---|
| 821 | do { |
---|
| 822 | res = match_prefix(pattern + i, pattern_len - i, str + j + len); |
---|
| 823 | } while (res == -1 && len-- > 0); |
---|
| 824 | return res == -1 ? -1 : j + res + len; |
---|
| 825 | } else if (pattern[i] != str[j]) { |
---|
| 826 | return -1; |
---|
| 827 | } |
---|
| 828 | } |
---|
| 829 | return j; |
---|
| 830 | } |
---|
| 831 | |
---|
| 832 | // HTTP 1.1 assumes keep alive if "Connection:" header is not set |
---|
| 833 | // This function must tolerate situations when connection info is not |
---|
| 834 | // set up, for example if request parsing failed. |
---|
| 835 | static int should_keep_alive(const struct mg_connection *conn) { |
---|
| 836 | const char *http_version = conn->request_info.http_version; |
---|
| 837 | const char *header = mg_get_header(conn, "Connection"); |
---|
| 838 | if (conn->must_close || |
---|
| 839 | conn->request_info.status_code == 401 || |
---|
| 840 | mg_strcasecmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes") != 0 || |
---|
| 841 | (header != NULL && mg_strcasecmp(header, "keep-alive") != 0) || |
---|
| 842 | (header == NULL && http_version && strcmp(http_version, "1.1"))) { |
---|
| 843 | return 0; |
---|
| 844 | } |
---|
| 845 | return 1; |
---|
| 846 | } |
---|
| 847 | |
---|
| 848 | static const char *suggest_connection_header(const struct mg_connection *conn) { |
---|
| 849 | return should_keep_alive(conn) ? "keep-alive" : "close"; |
---|
| 850 | } |
---|
| 851 | |
---|
| 852 | static void send_http_error(struct mg_connection *conn, int status, |
---|
| 853 | const char *reason, const char *fmt, ...) { |
---|
| 854 | char buf[BUFSIZ]; |
---|
| 855 | va_list ap; |
---|
| 856 | int len; |
---|
| 857 | |
---|
| 858 | conn->request_info.status_code = status; |
---|
| 859 | |
---|
| 860 | if (call_user(conn, MG_HTTP_ERROR) == NULL) { |
---|
| 861 | buf[0] = '\0'; |
---|
| 862 | len = 0; |
---|
| 863 | |
---|
| 864 | // Errors 1xx, 204 and 304 MUST NOT send a body |
---|
| 865 | if (status > 199 && status != 204 && status != 304) { |
---|
| 866 | len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason); |
---|
| 867 | cry(conn, "%s", buf); |
---|
| 868 | buf[len++] = '\n'; |
---|
| 869 | |
---|
| 870 | va_start(ap, fmt); |
---|
| 871 | len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap); |
---|
| 872 | va_end(ap); |
---|
| 873 | } |
---|
| 874 | DEBUG_TRACE(("[%s]", buf)); |
---|
| 875 | |
---|
| 876 | mg_printf(conn, "HTTP/1.1 %d %s\r\n" |
---|
| 877 | "Content-Type: text/plain\r\n" |
---|
| 878 | "Content-Length: %d\r\n" |
---|
| 879 | "Connection: %s\r\n\r\n", status, reason, len, |
---|
| 880 | suggest_connection_header(conn)); |
---|
| 881 | conn->num_bytes_sent += mg_printf(conn, "%s", buf); |
---|
| 882 | } |
---|
| 883 | } |
---|
| 884 | |
---|
| 885 | #if defined(_WIN32) && !defined(__SYMBIAN32__) |
---|
| 886 | static int pthread_mutex_init(pthread_mutex_t *mutex, void *unused) { |
---|
| 887 | unused = NULL; |
---|
| 888 | *mutex = CreateMutex(NULL, FALSE, NULL); |
---|
| 889 | return *mutex == NULL ? -1 : 0; |
---|
| 890 | } |
---|
| 891 | |
---|
| 892 | static int pthread_mutex_destroy(pthread_mutex_t *mutex) { |
---|
| 893 | return CloseHandle(*mutex) == 0 ? -1 : 0; |
---|
| 894 | } |
---|
| 895 | |
---|
| 896 | static int pthread_mutex_lock(pthread_mutex_t *mutex) { |
---|
| 897 | return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1; |
---|
| 898 | } |
---|
| 899 | |
---|
| 900 | static int pthread_mutex_unlock(pthread_mutex_t *mutex) { |
---|
| 901 | return ReleaseMutex(*mutex) == 0 ? -1 : 0; |
---|
| 902 | } |
---|
| 903 | |
---|
| 904 | static int pthread_cond_init(pthread_cond_t *cv, const void *unused) { |
---|
| 905 | unused = NULL; |
---|
| 906 | cv->signal = CreateEvent(NULL, FALSE, FALSE, NULL); |
---|
| 907 | cv->broadcast = CreateEvent(NULL, TRUE, FALSE, NULL); |
---|
| 908 | return cv->signal != NULL && cv->broadcast != NULL ? 0 : -1; |
---|
| 909 | } |
---|
| 910 | |
---|
| 911 | static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) { |
---|
| 912 | HANDLE handles[] = {cv->signal, cv->broadcast}; |
---|
| 913 | ReleaseMutex(*mutex); |
---|
| 914 | WaitForMultipleObjects(2, handles, FALSE, INFINITE); |
---|
| 915 | return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1; |
---|
| 916 | } |
---|
| 917 | |
---|
| 918 | static int pthread_cond_signal(pthread_cond_t *cv) { |
---|
| 919 | return SetEvent(cv->signal) == 0 ? -1 : 0; |
---|
| 920 | } |
---|
| 921 | |
---|
| 922 | static int pthread_cond_broadcast(pthread_cond_t *cv) { |
---|
| 923 | // Implementation with PulseEvent() has race condition, see |
---|
| 924 | // http://www.cs.wustl.edu/~schmidt/win32-cv-1.html |
---|
| 925 | return PulseEvent(cv->broadcast) == 0 ? -1 : 0; |
---|
| 926 | } |
---|
| 927 | |
---|
| 928 | static int pthread_cond_destroy(pthread_cond_t *cv) { |
---|
| 929 | return CloseHandle(cv->signal) && CloseHandle(cv->broadcast) ? 0 : -1; |
---|
| 930 | } |
---|
| 931 | |
---|
| 932 | // For Windows, change all slashes to backslashes in path names. |
---|
| 933 | static void change_slashes_to_backslashes(char *path) { |
---|
| 934 | int i; |
---|
| 935 | |
---|
| 936 | for (i = 0; path[i] != '\0'; i++) { |
---|
| 937 | if (path[i] == '/') |
---|
| 938 | path[i] = '\\'; |
---|
| 939 | // i > 0 check is to preserve UNC paths, like \\server\file.txt |
---|
| 940 | if (path[i] == '\\' && i > 0) |
---|
| 941 | while (path[i + 1] == '\\' || path[i + 1] == '/') |
---|
| 942 | (void) memmove(path + i + 1, |
---|
| 943 | path + i + 2, strlen(path + i + 1)); |
---|
| 944 | } |
---|
| 945 | } |
---|
| 946 | |
---|
| 947 | // Encode 'path' which is assumed UTF-8 string, into UNICODE string. |
---|
| 948 | // wbuf and wbuf_len is a target buffer and its length. |
---|
| 949 | static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) { |
---|
| 950 | char buf[PATH_MAX], buf2[PATH_MAX], *p; |
---|
| 951 | |
---|
| 952 | mg_strlcpy(buf, path, sizeof(buf)); |
---|
| 953 | change_slashes_to_backslashes(buf); |
---|
| 954 | |
---|
| 955 | // Point p to the end of the file name |
---|
| 956 | p = buf + strlen(buf) - 1; |
---|
| 957 | |
---|
| 958 | // Trim trailing backslash character |
---|
| 959 | while (p > buf && *p == '\\' && p[-1] != ':') { |
---|
| 960 | *p-- = '\0'; |
---|
| 961 | } |
---|
| 962 | |
---|
| 963 | // Protect from CGI code disclosure. |
---|
| 964 | // This is very nasty hole. Windows happily opens files with |
---|
| 965 | // some garbage in the end of file name. So fopen("a.cgi ", "r") |
---|
| 966 | // actually opens "a.cgi", and does not return an error! |
---|
| 967 | if (*p == 0x20 || // No space at the end |
---|
| 968 | (*p == 0x2e && p > buf) || // No '.' but allow '.' as full path |
---|
| 969 | *p == 0x2b || // No '+' |
---|
| 970 | (*p & ~0x7f)) { // And generally no non-ascii chars |
---|
| 971 | (void) fprintf(stderr, "Rejecting suspicious path: [%s]", buf); |
---|
| 972 | wbuf[0] = L'\0'; |
---|
| 973 | } else { |
---|
| 974 | // Convert to Unicode and back. If doubly-converted string does not |
---|
| 975 | // match the original, something is fishy, reject. |
---|
| 976 | memset(wbuf, 0, wbuf_len * sizeof(wchar_t)); |
---|
| 977 | MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); |
---|
| 978 | WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2), |
---|
| 979 | NULL, NULL); |
---|
| 980 | if (strcmp(buf, buf2) != 0) { |
---|
| 981 | wbuf[0] = L'\0'; |
---|
| 982 | } |
---|
| 983 | } |
---|
| 984 | } |
---|
| 985 | |
---|
| 986 | #if defined(_WIN32_WCE) |
---|
| 987 | static time_t time(time_t *ptime) { |
---|
| 988 | time_t t; |
---|
| 989 | SYSTEMTIME st; |
---|
| 990 | FILETIME ft; |
---|
| 991 | |
---|
| 992 | GetSystemTime(&st); |
---|
| 993 | SystemTimeToFileTime(&st, &ft); |
---|
| 994 | t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime); |
---|
| 995 | |
---|
| 996 | if (ptime != NULL) { |
---|
| 997 | *ptime = t; |
---|
| 998 | } |
---|
| 999 | |
---|
| 1000 | return t; |
---|
| 1001 | } |
---|
| 1002 | |
---|
| 1003 | static struct tm *localtime(const time_t *ptime, struct tm *ptm) { |
---|
| 1004 | int64_t t = ((int64_t) *ptime) * RATE_DIFF + EPOCH_DIFF; |
---|
| 1005 | FILETIME ft, lft; |
---|
| 1006 | SYSTEMTIME st; |
---|
| 1007 | TIME_ZONE_INFORMATION tzinfo; |
---|
| 1008 | |
---|
| 1009 | if (ptm == NULL) { |
---|
| 1010 | return NULL; |
---|
| 1011 | } |
---|
| 1012 | |
---|
| 1013 | * (int64_t *) &ft = t; |
---|
| 1014 | FileTimeToLocalFileTime(&ft, &lft); |
---|
| 1015 | FileTimeToSystemTime(&lft, &st); |
---|
| 1016 | ptm->tm_year = st.wYear - 1900; |
---|
| 1017 | ptm->tm_mon = st.wMonth - 1; |
---|
| 1018 | ptm->tm_wday = st.wDayOfWeek; |
---|
| 1019 | ptm->tm_mday = st.wDay; |
---|
| 1020 | ptm->tm_hour = st.wHour; |
---|
| 1021 | ptm->tm_min = st.wMinute; |
---|
| 1022 | ptm->tm_sec = st.wSecond; |
---|
| 1023 | ptm->tm_yday = 0; // hope nobody uses this |
---|
| 1024 | ptm->tm_isdst = |
---|
| 1025 | GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_DAYLIGHT ? 1 : 0; |
---|
| 1026 | |
---|
| 1027 | return ptm; |
---|
| 1028 | } |
---|
| 1029 | |
---|
| 1030 | static struct tm *gmtime(const time_t *ptime, struct tm *ptm) { |
---|
| 1031 | // FIXME(lsm): fix this. |
---|
| 1032 | return localtime(ptime, ptm); |
---|
| 1033 | } |
---|
| 1034 | |
---|
| 1035 | static size_t strftime(char *dst, size_t dst_size, const char *fmt, |
---|
| 1036 | const struct tm *tm) { |
---|
| 1037 | (void) snprintf(dst, dst_size, "implement strftime() for WinCE"); |
---|
| 1038 | return 0; |
---|
| 1039 | } |
---|
| 1040 | #endif |
---|
| 1041 | |
---|
| 1042 | static int mg_rename(const char* oldname, const char* newname) { |
---|
| 1043 | wchar_t woldbuf[PATH_MAX]; |
---|
| 1044 | wchar_t wnewbuf[PATH_MAX]; |
---|
| 1045 | |
---|
| 1046 | to_unicode(oldname, woldbuf, ARRAY_SIZE(woldbuf)); |
---|
| 1047 | to_unicode(newname, wnewbuf, ARRAY_SIZE(wnewbuf)); |
---|
| 1048 | |
---|
| 1049 | return MoveFileW(woldbuf, wnewbuf) ? 0 : -1; |
---|
| 1050 | } |
---|
| 1051 | |
---|
| 1052 | |
---|
| 1053 | static FILE *mg_fopen(const char *path, const char *mode) { |
---|
| 1054 | wchar_t wbuf[PATH_MAX], wmode[20]; |
---|
| 1055 | |
---|
| 1056 | to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
---|
| 1057 | MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode)); |
---|
| 1058 | |
---|
| 1059 | return _wfopen(wbuf, wmode); |
---|
| 1060 | } |
---|
| 1061 | |
---|
| 1062 | static int mg_stat(const char *path, struct mgstat *stp) { |
---|
| 1063 | int ok = -1; // Error |
---|
| 1064 | wchar_t wbuf[PATH_MAX]; |
---|
| 1065 | WIN32_FILE_ATTRIBUTE_DATA info; |
---|
| 1066 | |
---|
| 1067 | to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
---|
| 1068 | |
---|
| 1069 | if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) { |
---|
| 1070 | stp->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh); |
---|
| 1071 | stp->mtime = SYS2UNIX_TIME(info.ftLastWriteTime.dwLowDateTime, |
---|
| 1072 | info.ftLastWriteTime.dwHighDateTime); |
---|
| 1073 | stp->is_directory = |
---|
| 1074 | info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY; |
---|
| 1075 | ok = 0; // Success |
---|
| 1076 | } |
---|
| 1077 | |
---|
| 1078 | return ok; |
---|
| 1079 | } |
---|
| 1080 | |
---|
| 1081 | static int mg_remove(const char *path) { |
---|
| 1082 | wchar_t wbuf[PATH_MAX]; |
---|
| 1083 | to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
---|
| 1084 | return DeleteFileW(wbuf) ? 0 : -1; |
---|
| 1085 | } |
---|
| 1086 | |
---|
| 1087 | static int mg_mkdir(const char *path, int mode) { |
---|
| 1088 | char buf[PATH_MAX]; |
---|
| 1089 | wchar_t wbuf[PATH_MAX]; |
---|
| 1090 | |
---|
| 1091 | mode = 0; // Unused |
---|
| 1092 | mg_strlcpy(buf, path, sizeof(buf)); |
---|
| 1093 | change_slashes_to_backslashes(buf); |
---|
| 1094 | |
---|
| 1095 | (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, sizeof(wbuf)); |
---|
| 1096 | |
---|
| 1097 | return CreateDirectoryW(wbuf, NULL) ? 0 : -1; |
---|
| 1098 | } |
---|
| 1099 | |
---|
| 1100 | // Implementation of POSIX opendir/closedir/readdir for Windows. |
---|
| 1101 | static DIR * opendir(const char *name) { |
---|
| 1102 | DIR *dir = NULL; |
---|
| 1103 | wchar_t wpath[PATH_MAX]; |
---|
| 1104 | DWORD attrs; |
---|
| 1105 | |
---|
| 1106 | if (name == NULL) { |
---|
| 1107 | SetLastError(ERROR_BAD_ARGUMENTS); |
---|
| 1108 | } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) { |
---|
| 1109 | SetLastError(ERROR_NOT_ENOUGH_MEMORY); |
---|
| 1110 | } else { |
---|
| 1111 | to_unicode(name, wpath, ARRAY_SIZE(wpath)); |
---|
| 1112 | attrs = GetFileAttributesW(wpath); |
---|
| 1113 | if (attrs != 0xFFFFFFFF && |
---|
| 1114 | ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) { |
---|
| 1115 | (void) wcscat(wpath, L"\\*"); |
---|
| 1116 | dir->handle = FindFirstFileW(wpath, &dir->info); |
---|
| 1117 | dir->result.d_name[0] = '\0'; |
---|
| 1118 | } else { |
---|
| 1119 | free(dir); |
---|
| 1120 | dir = NULL; |
---|
| 1121 | } |
---|
| 1122 | } |
---|
| 1123 | |
---|
| 1124 | return dir; |
---|
| 1125 | } |
---|
| 1126 | |
---|
| 1127 | static int closedir(DIR *dir) { |
---|
| 1128 | int result = 0; |
---|
| 1129 | |
---|
| 1130 | if (dir != NULL) { |
---|
| 1131 | if (dir->handle != INVALID_HANDLE_VALUE) |
---|
| 1132 | result = FindClose(dir->handle) ? 0 : -1; |
---|
| 1133 | |
---|
| 1134 | free(dir); |
---|
| 1135 | } else { |
---|
| 1136 | result = -1; |
---|
| 1137 | SetLastError(ERROR_BAD_ARGUMENTS); |
---|
| 1138 | } |
---|
| 1139 | |
---|
| 1140 | return result; |
---|
| 1141 | } |
---|
| 1142 | |
---|
| 1143 | static struct dirent *readdir(DIR *dir) { |
---|
| 1144 | struct dirent *result = 0; |
---|
| 1145 | |
---|
| 1146 | if (dir) { |
---|
| 1147 | if (dir->handle != INVALID_HANDLE_VALUE) { |
---|
| 1148 | result = &dir->result; |
---|
| 1149 | (void) WideCharToMultiByte(CP_UTF8, 0, |
---|
| 1150 | dir->info.cFileName, -1, result->d_name, |
---|
| 1151 | sizeof(result->d_name), NULL, NULL); |
---|
| 1152 | |
---|
| 1153 | if (!FindNextFileW(dir->handle, &dir->info)) { |
---|
| 1154 | (void) FindClose(dir->handle); |
---|
| 1155 | dir->handle = INVALID_HANDLE_VALUE; |
---|
| 1156 | } |
---|
| 1157 | |
---|
| 1158 | } else { |
---|
| 1159 | SetLastError(ERROR_FILE_NOT_FOUND); |
---|
| 1160 | } |
---|
| 1161 | } else { |
---|
| 1162 | SetLastError(ERROR_BAD_ARGUMENTS); |
---|
| 1163 | } |
---|
| 1164 | |
---|
| 1165 | return result; |
---|
| 1166 | } |
---|
| 1167 | |
---|
| 1168 | #define set_close_on_exec(fd) // No FD_CLOEXEC on Windows |
---|
| 1169 | |
---|
| 1170 | static int start_thread(struct mg_context *ctx, mg_thread_func_t f, void *p) { |
---|
| 1171 | return _beginthread((void (__cdecl *)(void *)) f, 0, p) == -1L ? -1 : 0; |
---|
| 1172 | } |
---|
| 1173 | |
---|
| 1174 | static HANDLE dlopen(const char *dll_name, int flags) { |
---|
| 1175 | wchar_t wbuf[PATH_MAX]; |
---|
| 1176 | flags = 0; // Unused |
---|
| 1177 | to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf)); |
---|
| 1178 | return LoadLibraryW(wbuf); |
---|
| 1179 | } |
---|
| 1180 | |
---|
| 1181 | #if !defined(NO_CGI) |
---|
| 1182 | #define SIGKILL 0 |
---|
| 1183 | static int kill(pid_t pid, int sig_num) { |
---|
| 1184 | (void) TerminateProcess(pid, sig_num); |
---|
| 1185 | (void) CloseHandle(pid); |
---|
| 1186 | return 0; |
---|
| 1187 | } |
---|
| 1188 | |
---|
| 1189 | static pid_t spawn_process(struct mg_connection *conn, const char *prog, |
---|
| 1190 | char *envblk, char *envp[], int fd_stdin, |
---|
| 1191 | int fd_stdout, const char *dir) { |
---|
| 1192 | HANDLE me; |
---|
| 1193 | char *p, *interp, cmdline[PATH_MAX], buf[PATH_MAX]; |
---|
| 1194 | FILE *fp; |
---|
| 1195 | STARTUPINFOA si = { sizeof(si) }; |
---|
| 1196 | PROCESS_INFORMATION pi = { 0 }; |
---|
| 1197 | |
---|
| 1198 | envp = NULL; // Unused |
---|
| 1199 | |
---|
| 1200 | // TODO(lsm): redirect CGI errors to the error log file |
---|
| 1201 | si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; |
---|
| 1202 | si.wShowWindow = SW_HIDE; |
---|
| 1203 | |
---|
| 1204 | me = GetCurrentProcess(); |
---|
| 1205 | (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdin), me, |
---|
| 1206 | &si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS); |
---|
| 1207 | (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdout), me, |
---|
| 1208 | &si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS); |
---|
| 1209 | |
---|
| 1210 | // If CGI file is a script, try to read the interpreter line |
---|
| 1211 | interp = conn->ctx->config[CGI_INTERPRETER]; |
---|
| 1212 | if (interp == NULL) { |
---|
| 1213 | buf[2] = '\0'; |
---|
| 1214 | mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%c%s", dir, DIRSEP, prog); |
---|
| 1215 | if ((fp = fopen(cmdline, "r")) != NULL) { |
---|
| 1216 | (void) fgets(buf, sizeof(buf), fp); |
---|
| 1217 | if (buf[0] != '#' || buf[1] != '!') { |
---|
| 1218 | // First line does not start with "#!". Do not set interpreter. |
---|
| 1219 | buf[2] = '\0'; |
---|
| 1220 | } else { |
---|
| 1221 | // Trim whitespaces in interpreter name |
---|
| 1222 | for (p = &buf[strlen(buf) - 1]; p > buf && isspace(*p); p--) { |
---|
| 1223 | *p = '\0'; |
---|
| 1224 | } |
---|
| 1225 | } |
---|
| 1226 | (void) fclose(fp); |
---|
| 1227 | } |
---|
| 1228 | interp = buf + 2; |
---|
| 1229 | } |
---|
| 1230 | |
---|
| 1231 | (void) mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s%s%c%s", |
---|
| 1232 | interp, interp[0] == '\0' ? "" : " ", dir, DIRSEP, prog); |
---|
| 1233 | |
---|
| 1234 | DEBUG_TRACE(("Running [%s]", cmdline)); |
---|
| 1235 | if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE, |
---|
| 1236 | CREATE_NEW_PROCESS_GROUP, envblk, dir, &si, &pi) == 0) { |
---|
| 1237 | cry(conn, "%s: CreateProcess(%s): %d", |
---|
| 1238 | __func__, cmdline, ERRNO); |
---|
| 1239 | pi.hProcess = (pid_t) -1; |
---|
| 1240 | } else { |
---|
| 1241 | (void) close(fd_stdin); |
---|
| 1242 | (void) close(fd_stdout); |
---|
| 1243 | } |
---|
| 1244 | |
---|
| 1245 | (void) CloseHandle(si.hStdOutput); |
---|
| 1246 | (void) CloseHandle(si.hStdInput); |
---|
| 1247 | (void) CloseHandle(pi.hThread); |
---|
| 1248 | |
---|
| 1249 | return (pid_t) pi.hProcess; |
---|
| 1250 | } |
---|
| 1251 | #endif // !NO_CGI |
---|
| 1252 | |
---|
| 1253 | static int set_non_blocking_mode(SOCKET sock) { |
---|
| 1254 | unsigned long on = 1; |
---|
| 1255 | return ioctlsocket(sock, FIONBIO, &on); |
---|
| 1256 | } |
---|
| 1257 | |
---|
| 1258 | #else |
---|
| 1259 | static int mg_stat(const char *path, struct mgstat *stp) { |
---|
| 1260 | struct stat st; |
---|
| 1261 | int ok; |
---|
| 1262 | |
---|
| 1263 | if (stat(path, &st) == 0) { |
---|
| 1264 | ok = 0; |
---|
| 1265 | stp->size = st.st_size; |
---|
| 1266 | stp->mtime = st.st_mtime; |
---|
| 1267 | stp->is_directory = S_ISDIR(st.st_mode); |
---|
| 1268 | } else { |
---|
| 1269 | ok = -1; |
---|
| 1270 | } |
---|
| 1271 | |
---|
| 1272 | return ok; |
---|
| 1273 | } |
---|
| 1274 | |
---|
| 1275 | static void set_close_on_exec(int fd) { |
---|
| 1276 | (void) fcntl(fd, F_SETFD, FD_CLOEXEC); |
---|
| 1277 | } |
---|
| 1278 | |
---|
| 1279 | static int start_thread(struct mg_context *ctx, mg_thread_func_t func, |
---|
| 1280 | void *param) { |
---|
| 1281 | pthread_t thread_id; |
---|
| 1282 | pthread_attr_t attr; |
---|
| 1283 | int retval; |
---|
| 1284 | char* stacksize = ctx->config[THREAD_STACK_SIZE]; |
---|
| 1285 | char* priority = ctx->config[THREAD_PRIORITY]; |
---|
| 1286 | char* policy = ctx->config[THREAD_POLICY]; |
---|
| 1287 | int noinheritsched = 0; |
---|
| 1288 | |
---|
| 1289 | (void) pthread_attr_init(&attr); |
---|
| 1290 | (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); |
---|
| 1291 | // TODO(lsm): figure out why mongoose dies on Linux if next line is enabled |
---|
| 1292 | // (void) pthread_attr_setstacksize(&attr, sizeof(struct mg_connection) * 5); |
---|
| 1293 | |
---|
| 1294 | if (stacksize != NULL) { |
---|
| 1295 | size_t size = atoi(stacksize); |
---|
| 1296 | (void) pthread_attr_setstacksize(&attr, size); |
---|
| 1297 | } |
---|
| 1298 | |
---|
| 1299 | if (priority != NULL) { |
---|
| 1300 | struct sched_param sched_param; |
---|
| 1301 | memset(&sched_param, 0, sizeof(sched_param)); |
---|
| 1302 | sched_param.sched_priority = atoi(priority); |
---|
| 1303 | (void) pthread_attr_setschedparam(&attr, &sched_param); |
---|
| 1304 | noinheritsched = 1; |
---|
| 1305 | } |
---|
| 1306 | |
---|
| 1307 | if (policy != NULL) { |
---|
| 1308 | int p_policy; |
---|
| 1309 | (void) pthread_attr_getschedpolicy(&attr, &p_policy); |
---|
| 1310 | |
---|
| 1311 | switch (policy[0]) { |
---|
| 1312 | case 'o': |
---|
| 1313 | p_policy = SCHED_OTHER; |
---|
| 1314 | break; |
---|
| 1315 | case 'f': |
---|
| 1316 | p_policy = SCHED_FIFO; |
---|
| 1317 | break; |
---|
| 1318 | case 'r': |
---|
| 1319 | p_policy = SCHED_RR; |
---|
| 1320 | break; |
---|
| 1321 | #if defined(_POSIX_SPORADIC_SERVER) || defined(_POSIX_THREAD_SPORADIC_SERVER) |
---|
| 1322 | case 's': |
---|
| 1323 | p_policy = SCHED_SPORADIC; |
---|
| 1324 | break; |
---|
| 1325 | #endif |
---|
| 1326 | default: |
---|
| 1327 | cry(fc(ctx), "%s: Unknown scheduler: %s", __func__, policy); |
---|
| 1328 | break; |
---|
| 1329 | } |
---|
| 1330 | |
---|
| 1331 | (void) pthread_attr_setschedpolicy(&attr, p_policy); |
---|
| 1332 | |
---|
| 1333 | noinheritsched = 1; |
---|
| 1334 | } |
---|
| 1335 | |
---|
| 1336 | if (noinheritsched != 0) { |
---|
| 1337 | (void) pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED); |
---|
| 1338 | } |
---|
| 1339 | |
---|
| 1340 | if ((retval = pthread_create(&thread_id, &attr, func, param)) != 0) { |
---|
| 1341 | cry(fc(ctx), "%s: %s", __func__, strerror(retval)); |
---|
| 1342 | } |
---|
| 1343 | |
---|
| 1344 | return retval; |
---|
| 1345 | } |
---|
| 1346 | |
---|
| 1347 | #ifndef NO_CGI |
---|
| 1348 | static pid_t spawn_process(struct mg_connection *conn, const char *prog, |
---|
| 1349 | char *envblk, char *envp[], int fd_stdin, |
---|
| 1350 | int fd_stdout, const char *dir) { |
---|
| 1351 | pid_t pid; |
---|
| 1352 | const char *interp; |
---|
| 1353 | |
---|
| 1354 | envblk = NULL; // Unused |
---|
| 1355 | |
---|
| 1356 | if ((pid = fork()) == -1) { |
---|
| 1357 | // Parent |
---|
| 1358 | send_http_error(conn, 500, http_500_error, "fork(): %s", strerror(ERRNO)); |
---|
| 1359 | } else if (pid == 0) { |
---|
| 1360 | // Child |
---|
| 1361 | if (chdir(dir) != 0) { |
---|
| 1362 | cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO)); |
---|
| 1363 | } else if (dup2(fd_stdin, 0) == -1) { |
---|
| 1364 | cry(conn, "%s: dup2(%d, 0): %s", __func__, fd_stdin, strerror(ERRNO)); |
---|
| 1365 | } else if (dup2(fd_stdout, 1) == -1) { |
---|
| 1366 | cry(conn, "%s: dup2(%d, 1): %s", __func__, fd_stdout, strerror(ERRNO)); |
---|
| 1367 | } else { |
---|
| 1368 | (void) dup2(fd_stdout, 2); |
---|
| 1369 | (void) close(fd_stdin); |
---|
| 1370 | (void) close(fd_stdout); |
---|
| 1371 | |
---|
| 1372 | // Execute CGI program. No need to lock: new process |
---|
| 1373 | interp = conn->ctx->config[CGI_INTERPRETER]; |
---|
| 1374 | if (interp == NULL) { |
---|
| 1375 | (void) execle(prog, prog, NULL, envp); |
---|
| 1376 | cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO)); |
---|
| 1377 | } else { |
---|
| 1378 | (void) execle(interp, interp, prog, NULL, envp); |
---|
| 1379 | cry(conn, "%s: execle(%s %s): %s", __func__, interp, prog, |
---|
| 1380 | strerror(ERRNO)); |
---|
| 1381 | } |
---|
| 1382 | } |
---|
| 1383 | exit(EXIT_FAILURE); |
---|
| 1384 | } else { |
---|
| 1385 | // Parent. Close stdio descriptors |
---|
| 1386 | (void) close(fd_stdin); |
---|
| 1387 | (void) close(fd_stdout); |
---|
| 1388 | } |
---|
| 1389 | |
---|
| 1390 | return pid; |
---|
| 1391 | } |
---|
| 1392 | #endif // !NO_CGI |
---|
| 1393 | |
---|
| 1394 | static int set_non_blocking_mode(SOCKET sock) { |
---|
| 1395 | int flags; |
---|
| 1396 | |
---|
| 1397 | flags = fcntl(sock, F_GETFL, 0); |
---|
| 1398 | (void) fcntl(sock, F_SETFL, flags | O_NONBLOCK); |
---|
| 1399 | |
---|
| 1400 | return 0; |
---|
| 1401 | } |
---|
| 1402 | #endif // _WIN32 |
---|
| 1403 | |
---|
| 1404 | // Write data to the IO channel - opened file descriptor, socket or SSL |
---|
| 1405 | // descriptor. Return number of bytes written. |
---|
| 1406 | static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf, |
---|
| 1407 | int64_t len) { |
---|
| 1408 | int64_t sent; |
---|
| 1409 | int n, k; |
---|
| 1410 | |
---|
| 1411 | sent = 0; |
---|
| 1412 | while (sent < len) { |
---|
| 1413 | |
---|
| 1414 | // How many bytes we send in this iteration |
---|
| 1415 | k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent); |
---|
| 1416 | |
---|
| 1417 | if (ssl != NULL) { |
---|
| 1418 | n = SSL_write(ssl, buf + sent, k); |
---|
| 1419 | } else if (fp != NULL) { |
---|
| 1420 | n = fwrite(buf + sent, 1, (size_t) k, fp); |
---|
| 1421 | if (ferror(fp)) |
---|
| 1422 | n = -1; |
---|
| 1423 | } else { |
---|
| 1424 | n = send(sock, buf + sent, (size_t) k, MSG_NOSIGNAL); |
---|
| 1425 | } |
---|
| 1426 | |
---|
| 1427 | if (n < 0) |
---|
| 1428 | break; |
---|
| 1429 | |
---|
| 1430 | sent += n; |
---|
| 1431 | } |
---|
| 1432 | |
---|
| 1433 | return sent; |
---|
| 1434 | } |
---|
| 1435 | |
---|
| 1436 | // Read from IO channel - opened file descriptor, socket, or SSL descriptor. |
---|
| 1437 | // Return number of bytes read. |
---|
| 1438 | static int pull(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int len) { |
---|
| 1439 | int nread; |
---|
| 1440 | |
---|
| 1441 | if (ssl != NULL) { |
---|
| 1442 | nread = SSL_read(ssl, buf, len); |
---|
| 1443 | } else if (fp != NULL) { |
---|
| 1444 | // Use read() instead of fread(), because if we're reading from the CGI |
---|
| 1445 | // pipe, fread() may block until IO buffer is filled up. We cannot afford |
---|
| 1446 | // to block and must pass all read bytes immediately to the client. |
---|
| 1447 | nread = read(fileno(fp), buf, (size_t) len); |
---|
| 1448 | if (ferror(fp)) |
---|
| 1449 | nread = -1; |
---|
| 1450 | } else { |
---|
| 1451 | nread = recv(sock, buf, (size_t) len, 0); |
---|
| 1452 | } |
---|
| 1453 | |
---|
| 1454 | return nread; |
---|
| 1455 | } |
---|
| 1456 | |
---|
| 1457 | int mg_read(struct mg_connection *conn, void *buf, size_t len) { |
---|
| 1458 | int n, buffered_len, nread; |
---|
| 1459 | const char *buffered; |
---|
| 1460 | |
---|
| 1461 | assert((conn->content_len == -1 && conn->consumed_content == 0) || |
---|
| 1462 | conn->consumed_content <= conn->content_len); |
---|
| 1463 | DEBUG_TRACE(("%p %zu %lld %lld", buf, len, |
---|
| 1464 | conn->content_len, conn->consumed_content)); |
---|
| 1465 | nread = 0; |
---|
| 1466 | if (conn->consumed_content < conn->content_len) { |
---|
| 1467 | |
---|
| 1468 | // Adjust number of bytes to read. |
---|
| 1469 | int64_t to_read = conn->content_len - conn->consumed_content; |
---|
| 1470 | if (to_read < (int64_t) len) { |
---|
| 1471 | len = (int) to_read; |
---|
| 1472 | } |
---|
| 1473 | |
---|
| 1474 | // How many bytes of data we have buffered in the request buffer? |
---|
| 1475 | buffered = conn->buf + conn->request_len + conn->consumed_content; |
---|
| 1476 | buffered_len = conn->data_len - conn->request_len; |
---|
| 1477 | assert(buffered_len >= 0); |
---|
| 1478 | |
---|
| 1479 | // Return buffered data back if we haven't done that yet. |
---|
| 1480 | if (conn->consumed_content < (int64_t) buffered_len) { |
---|
| 1481 | buffered_len -= (int) conn->consumed_content; |
---|
| 1482 | if (len < (size_t) buffered_len) { |
---|
| 1483 | buffered_len = len; |
---|
| 1484 | } |
---|
| 1485 | memcpy(buf, buffered, (size_t)buffered_len); |
---|
| 1486 | len -= buffered_len; |
---|
| 1487 | buf = (char *) buf + buffered_len; |
---|
| 1488 | conn->consumed_content += buffered_len; |
---|
| 1489 | nread = buffered_len; |
---|
| 1490 | } |
---|
| 1491 | |
---|
| 1492 | // We have returned all buffered data. Read new data from the remote socket. |
---|
| 1493 | while (len > 0) { |
---|
| 1494 | n = pull(NULL, conn->client.sock, conn->ssl, (char *) buf, (int) len); |
---|
| 1495 | if (n <= 0) { |
---|
| 1496 | break; |
---|
| 1497 | } |
---|
| 1498 | buf = (char *) buf + n; |
---|
| 1499 | conn->consumed_content += n; |
---|
| 1500 | nread += n; |
---|
| 1501 | len -= n; |
---|
| 1502 | } |
---|
| 1503 | } |
---|
| 1504 | return nread; |
---|
| 1505 | } |
---|
| 1506 | |
---|
| 1507 | int mg_write(struct mg_connection *conn, const void *buf, size_t len) { |
---|
| 1508 | return (int) push(NULL, conn->client.sock, conn->ssl, (const char *) buf, |
---|
| 1509 | (int64_t) len); |
---|
| 1510 | } |
---|
| 1511 | |
---|
| 1512 | int mg_printf(struct mg_connection *conn, const char *fmt, ...) { |
---|
| 1513 | char buf[BUFSIZ]; |
---|
| 1514 | int len; |
---|
| 1515 | va_list ap; |
---|
| 1516 | |
---|
| 1517 | va_start(ap, fmt); |
---|
| 1518 | len = mg_vsnprintf(conn, buf, sizeof(buf), fmt, ap); |
---|
| 1519 | va_end(ap); |
---|
| 1520 | |
---|
| 1521 | return mg_write(conn, buf, (size_t)len); |
---|
| 1522 | } |
---|
| 1523 | |
---|
| 1524 | // URL-decode input buffer into destination buffer. |
---|
| 1525 | // 0-terminate the destination buffer. Return the length of decoded data. |
---|
| 1526 | // form-url-encoded data differs from URI encoding in a way that it |
---|
| 1527 | // uses '+' as character for space, see RFC 1866 section 8.2.1 |
---|
| 1528 | // http://ftp.ics.uci.edu/pub/ietf/html/rfc1866.txt |
---|
| 1529 | static size_t url_decode(const char *src, size_t src_len, char *dst, |
---|
| 1530 | size_t dst_len, int is_form_url_encoded) { |
---|
| 1531 | size_t i, j; |
---|
| 1532 | int a, b; |
---|
| 1533 | #define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W') |
---|
| 1534 | |
---|
| 1535 | for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) { |
---|
| 1536 | if (src[i] == '%' && |
---|
| 1537 | isxdigit(* (const unsigned char *) (src + i + 1)) && |
---|
| 1538 | isxdigit(* (const unsigned char *) (src + i + 2))) { |
---|
| 1539 | a = tolower(* (const unsigned char *) (src + i + 1)); |
---|
| 1540 | b = tolower(* (const unsigned char *) (src + i + 2)); |
---|
| 1541 | dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b)); |
---|
| 1542 | i += 2; |
---|
| 1543 | } else if (is_form_url_encoded && src[i] == '+') { |
---|
| 1544 | dst[j] = ' '; |
---|
| 1545 | } else { |
---|
| 1546 | dst[j] = src[i]; |
---|
| 1547 | } |
---|
| 1548 | } |
---|
| 1549 | |
---|
| 1550 | dst[j] = '\0'; // Null-terminate the destination |
---|
| 1551 | |
---|
| 1552 | return j; |
---|
| 1553 | } |
---|
| 1554 | |
---|
| 1555 | // Scan given buffer and fetch the value of the given variable. |
---|
| 1556 | // It can be specified in query string, or in the POST data. |
---|
| 1557 | // Return NULL if the variable not found, or allocated 0-terminated value. |
---|
| 1558 | // It is caller's responsibility to free the returned value. |
---|
| 1559 | int mg_get_var(const char *buf, size_t buf_len, const char *name, |
---|
| 1560 | char *dst, size_t dst_len) { |
---|
| 1561 | const char *p, *e, *s; |
---|
| 1562 | size_t name_len, len; |
---|
| 1563 | |
---|
| 1564 | name_len = strlen(name); |
---|
| 1565 | e = buf + buf_len; |
---|
| 1566 | len = -1; |
---|
| 1567 | dst[0] = '\0'; |
---|
| 1568 | |
---|
| 1569 | // buf is "var1=val1&var2=val2...". Find variable first |
---|
| 1570 | for (p = buf; p != NULL && p + name_len < e; p++) { |
---|
| 1571 | if ((p == buf || p[-1] == '&') && p[name_len] == '=' && |
---|
| 1572 | !mg_strncasecmp(name, p, name_len)) { |
---|
| 1573 | |
---|
| 1574 | // Point p to variable value |
---|
| 1575 | p += name_len + 1; |
---|
| 1576 | |
---|
| 1577 | // Point s to the end of the value |
---|
| 1578 | s = (const char *) memchr(p, '&', (size_t)(e - p)); |
---|
| 1579 | if (s == NULL) { |
---|
| 1580 | s = e; |
---|
| 1581 | } |
---|
| 1582 | assert(s >= p); |
---|
| 1583 | |
---|
| 1584 | // Decode variable into destination buffer |
---|
| 1585 | if ((size_t) (s - p) < dst_len) { |
---|
| 1586 | len = url_decode(p, (size_t)(s - p), dst, dst_len, 1); |
---|
| 1587 | } |
---|
| 1588 | break; |
---|
| 1589 | } |
---|
| 1590 | } |
---|
| 1591 | |
---|
| 1592 | return len; |
---|
| 1593 | } |
---|
| 1594 | |
---|
| 1595 | int mg_get_cookie(const struct mg_connection *conn, const char *cookie_name, |
---|
| 1596 | char *dst, size_t dst_size) { |
---|
| 1597 | const char *s, *p, *end; |
---|
| 1598 | int name_len, len = -1; |
---|
| 1599 | |
---|
| 1600 | dst[0] = '\0'; |
---|
| 1601 | if ((s = mg_get_header(conn, "Cookie")) == NULL) { |
---|
| 1602 | return 0; |
---|
| 1603 | } |
---|
| 1604 | |
---|
| 1605 | name_len = strlen(cookie_name); |
---|
| 1606 | end = s + strlen(s); |
---|
| 1607 | |
---|
| 1608 | for (; (s = strstr(s, cookie_name)) != NULL; s += name_len) |
---|
| 1609 | if (s[name_len] == '=') { |
---|
| 1610 | s += name_len + 1; |
---|
| 1611 | if ((p = strchr(s, ' ')) == NULL) |
---|
| 1612 | p = end; |
---|
| 1613 | if (p[-1] == ';') |
---|
| 1614 | p--; |
---|
| 1615 | if (*s == '"' && p[-1] == '"' && p > s + 1) { |
---|
| 1616 | s++; |
---|
| 1617 | p--; |
---|
| 1618 | } |
---|
| 1619 | if ((size_t) (p - s) < dst_size) { |
---|
| 1620 | len = (p - s) + 1; |
---|
| 1621 | mg_strlcpy(dst, s, (size_t)len); |
---|
| 1622 | } |
---|
| 1623 | break; |
---|
| 1624 | } |
---|
| 1625 | |
---|
| 1626 | return len; |
---|
| 1627 | } |
---|
| 1628 | |
---|
| 1629 | static int convert_uri_to_file_name(struct mg_connection *conn, char *buf, |
---|
| 1630 | size_t buf_len, struct mgstat *st) { |
---|
| 1631 | struct vec a, b; |
---|
| 1632 | const char *rewrite, *uri = conn->request_info.uri; |
---|
| 1633 | char *p; |
---|
| 1634 | int match_len, stat_result; |
---|
| 1635 | |
---|
| 1636 | buf_len--; // This is because memmove() for PATH_INFO may shift part |
---|
| 1637 | // of the path one byte on the right. |
---|
| 1638 | mg_snprintf(conn, buf, buf_len, "%s%s", conn->ctx->config[DOCUMENT_ROOT], |
---|
| 1639 | uri); |
---|
| 1640 | |
---|
| 1641 | rewrite = conn->ctx->config[REWRITE]; |
---|
| 1642 | while ((rewrite = next_option(rewrite, &a, &b)) != NULL) { |
---|
| 1643 | if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) { |
---|
| 1644 | mg_snprintf(conn, buf, buf_len, "%.*s%s", b.len, b.ptr, uri + match_len); |
---|
| 1645 | break; |
---|
| 1646 | } |
---|
| 1647 | } |
---|
| 1648 | |
---|
| 1649 | #if defined(_WIN32) && !defined(__SYMBIAN32__) |
---|
| 1650 | //change_slashes_to_backslashes(buf); |
---|
| 1651 | #endif // _WIN32 |
---|
| 1652 | |
---|
| 1653 | if ((stat_result = mg_stat(buf, st)) != 0) { |
---|
| 1654 | // Support PATH_INFO for CGI scripts. |
---|
| 1655 | for (p = buf + strlen(buf); p > buf + 1; p--) { |
---|
| 1656 | if (*p == '/') { |
---|
| 1657 | *p = '\0'; |
---|
| 1658 | if (match_prefix(conn->ctx->config[CGI_EXTENSIONS], |
---|
| 1659 | strlen(conn->ctx->config[CGI_EXTENSIONS]), buf) > 0 && |
---|
| 1660 | (stat_result = mg_stat(buf, st)) == 0) { |
---|
| 1661 | // Shift PATH_INFO block one character right, e.g. |
---|
| 1662 | // "/x.cgi/foo/bar\x00" => "/x.cgi\x00/foo/bar\x00" |
---|
| 1663 | // conn->path_info is pointing to the local variable "path" declared |
---|
| 1664 | // in handle_request(), so PATH_INFO not valid after |
---|
| 1665 | // handle_request returns. |
---|
| 1666 | conn->path_info = p + 1; |
---|
| 1667 | memmove(p + 2, p + 1, strlen(p + 1) + 1); // +1 is for trailing \0 |
---|
| 1668 | p[1] = '/'; |
---|
| 1669 | break; |
---|
| 1670 | } else { |
---|
| 1671 | *p = '/'; |
---|
| 1672 | stat_result = -1; |
---|
| 1673 | } |
---|
| 1674 | } |
---|
| 1675 | } |
---|
| 1676 | } |
---|
| 1677 | |
---|
| 1678 | return stat_result; |
---|
| 1679 | } |
---|
| 1680 | |
---|
| 1681 | static int sslize(struct mg_connection *conn, int (*func)(SSL *)) { |
---|
| 1682 | return (conn->ssl = SSL_new(conn->ctx->ssl_ctx)) != NULL && |
---|
| 1683 | SSL_set_fd(conn->ssl, conn->client.sock) == 1 && |
---|
| 1684 | func(conn->ssl) == 1; |
---|
| 1685 | } |
---|
| 1686 | |
---|
| 1687 | // Check whether full request is buffered. Return: |
---|
| 1688 | // -1 if request is malformed |
---|
| 1689 | // 0 if request is not yet fully buffered |
---|
| 1690 | // >0 actual request length, including last \r\n\r\n |
---|
| 1691 | static int get_request_len(const char *buf, int buflen) { |
---|
| 1692 | const char *s, *e; |
---|
| 1693 | int len = 0; |
---|
| 1694 | |
---|
| 1695 | DEBUG_TRACE(("buf: %p, len: %d", buf, buflen)); |
---|
| 1696 | for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++) |
---|
| 1697 | // Control characters are not allowed but >=128 is. |
---|
| 1698 | if (!isprint(* (const unsigned char *) s) && *s != '\r' && |
---|
| 1699 | *s != '\n' && * (const unsigned char *) s < 128) { |
---|
| 1700 | len = -1; |
---|
| 1701 | } else if (s[0] == '\n' && s[1] == '\n') { |
---|
| 1702 | len = (int) (s - buf) + 2; |
---|
| 1703 | } else if (s[0] == '\n' && &s[1] < e && |
---|
| 1704 | s[1] == '\r' && s[2] == '\n') { |
---|
| 1705 | len = (int) (s - buf) + 3; |
---|
| 1706 | } |
---|
| 1707 | |
---|
| 1708 | return len; |
---|
| 1709 | } |
---|
| 1710 | |
---|
| 1711 | // Convert month to the month number. Return -1 on error, or month number |
---|
| 1712 | static int get_month_index(const char *s) { |
---|
| 1713 | size_t i; |
---|
| 1714 | |
---|
| 1715 | for (i = 0; i < ARRAY_SIZE(month_names); i++) |
---|
| 1716 | if (!strcmp(s, month_names[i])) |
---|
| 1717 | return (int) i; |
---|
| 1718 | |
---|
| 1719 | return -1; |
---|
| 1720 | } |
---|
| 1721 | |
---|
| 1722 | // Parse UTC date-time string, and return the corresponding time_t value. |
---|
| 1723 | static time_t parse_date_string(const char *datetime) { |
---|
| 1724 | static const unsigned short days_before_month[] = { |
---|
| 1725 | 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 |
---|
| 1726 | }; |
---|
| 1727 | char month_str[32]; |
---|
| 1728 | int second, minute, hour, day, month, year, leap_days, days; |
---|
| 1729 | time_t result = (time_t) 0; |
---|
| 1730 | |
---|
| 1731 | if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d", |
---|
| 1732 | &day, month_str, &year, &hour, &minute, &second) == 6) || |
---|
| 1733 | (sscanf(datetime, "%d %3s %d %d:%d:%d", |
---|
| 1734 | &day, month_str, &year, &hour, &minute, &second) == 6) || |
---|
| 1735 | (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d", |
---|
| 1736 | &day, month_str, &year, &hour, &minute, &second) == 6) || |
---|
| 1737 | (sscanf(datetime, "%d-%3s-%d %d:%d:%d", |
---|
| 1738 | &day, month_str, &year, &hour, &minute, &second) == 6)) && |
---|
| 1739 | year > 1970 && |
---|
| 1740 | (month = get_month_index(month_str)) != -1) { |
---|
| 1741 | year -= 1970; |
---|
| 1742 | leap_days = year / 4 - year / 100 + year / 400; |
---|
| 1743 | days = year * 365 + days_before_month[month] + (day - 1) + leap_days; |
---|
| 1744 | result = days * 24 * 3600 + hour * 3600 + minute * 60 + second; |
---|
| 1745 | } |
---|
| 1746 | |
---|
| 1747 | return result; |
---|
| 1748 | } |
---|
| 1749 | |
---|
| 1750 | // Protect against directory disclosure attack by removing '..', |
---|
| 1751 | // excessive '/' and '\' characters |
---|
| 1752 | static void remove_double_dots_and_double_slashes(char *s) { |
---|
| 1753 | char *p = s; |
---|
| 1754 | |
---|
| 1755 | while (*s != '\0') { |
---|
| 1756 | *p++ = *s++; |
---|
| 1757 | if (IS_DIRSEP_CHAR(s[-1])) { |
---|
| 1758 | // Skip all following slashes and backslashes |
---|
| 1759 | while (IS_DIRSEP_CHAR(s[0])) { |
---|
| 1760 | s++; |
---|
| 1761 | } |
---|
| 1762 | |
---|
| 1763 | // Skip all double-dots |
---|
| 1764 | while (*s == '.' && s[1] == '.') { |
---|
| 1765 | s += 2; |
---|
| 1766 | } |
---|
| 1767 | } |
---|
| 1768 | } |
---|
| 1769 | *p = '\0'; |
---|
| 1770 | } |
---|
| 1771 | |
---|
| 1772 | static const struct { |
---|
| 1773 | const char *extension; |
---|
| 1774 | size_t ext_len; |
---|
| 1775 | const char *mime_type; |
---|
| 1776 | size_t mime_type_len; |
---|
| 1777 | } builtin_mime_types[] = { |
---|
| 1778 | {".html", 5, "text/html", 9}, |
---|
| 1779 | {".htm", 4, "text/html", 9}, |
---|
| 1780 | {".shtm", 5, "text/html", 9}, |
---|
| 1781 | {".shtml", 6, "text/html", 9}, |
---|
| 1782 | {".css", 4, "text/css", 8}, |
---|
| 1783 | {".js", 3, "application/x-javascript", 24}, |
---|
| 1784 | {".ico", 4, "image/x-icon", 12}, |
---|
| 1785 | {".gif", 4, "image/gif", 9}, |
---|
| 1786 | {".jpg", 4, "image/jpeg", 10}, |
---|
| 1787 | {".jpeg", 5, "image/jpeg", 10}, |
---|
| 1788 | {".png", 4, "image/png", 9}, |
---|
| 1789 | {".svg", 4, "image/svg+xml", 13}, |
---|
| 1790 | {".torrent", 8, "application/x-bittorrent", 24}, |
---|
| 1791 | {".wav", 4, "audio/x-wav", 11}, |
---|
| 1792 | {".mp3", 4, "audio/x-mp3", 11}, |
---|
| 1793 | {".mid", 4, "audio/mid", 9}, |
---|
| 1794 | {".m3u", 4, "audio/x-mpegurl", 15}, |
---|
| 1795 | {".ram", 4, "audio/x-pn-realaudio", 20}, |
---|
| 1796 | {".xml", 4, "text/xml", 8}, |
---|
| 1797 | {".xslt", 5, "application/xml", 15}, |
---|
| 1798 | {".ra", 3, "audio/x-pn-realaudio", 20}, |
---|
| 1799 | {".doc", 4, "application/msword", 19}, |
---|
| 1800 | {".exe", 4, "application/octet-stream", 24}, |
---|
| 1801 | {".zip", 4, "application/x-zip-compressed", 28}, |
---|
| 1802 | {".xls", 4, "application/excel", 17}, |
---|
| 1803 | {".tgz", 4, "application/x-tar-gz", 20}, |
---|
| 1804 | {".tar", 4, "application/x-tar", 17}, |
---|
| 1805 | {".gz", 3, "application/x-gunzip", 20}, |
---|
| 1806 | {".arj", 4, "application/x-arj-compressed", 28}, |
---|
| 1807 | {".rar", 4, "application/x-arj-compressed", 28}, |
---|
| 1808 | {".rtf", 4, "application/rtf", 15}, |
---|
| 1809 | {".pdf", 4, "application/pdf", 15}, |
---|
| 1810 | {".swf", 4, "application/x-shockwave-flash",29}, |
---|
| 1811 | {".mpg", 4, "video/mpeg", 10}, |
---|
| 1812 | {".mpeg", 5, "video/mpeg", 10}, |
---|
| 1813 | {".mp4", 4, "video/mp4", 9}, |
---|
| 1814 | {".m4v", 4, "video/x-m4v", 11}, |
---|
| 1815 | {".asf", 4, "video/x-ms-asf", 14}, |
---|
| 1816 | {".avi", 4, "video/x-msvideo", 15}, |
---|
| 1817 | {".bmp", 4, "image/bmp", 9}, |
---|
| 1818 | {NULL, 0, NULL, 0} |
---|
| 1819 | }; |
---|
| 1820 | |
---|
| 1821 | // Look at the "path" extension and figure what mime type it has. |
---|
| 1822 | // Store mime type in the vector. |
---|
| 1823 | static void get_mime_type(struct mg_context *ctx, const char *path, |
---|
| 1824 | struct vec *vec) { |
---|
| 1825 | struct vec ext_vec, mime_vec; |
---|
| 1826 | const char *list, *ext; |
---|
| 1827 | size_t i, path_len; |
---|
| 1828 | |
---|
| 1829 | path_len = strlen(path); |
---|
| 1830 | |
---|
| 1831 | // Scan user-defined mime types first, in case user wants to |
---|
| 1832 | // override default mime types. |
---|
| 1833 | list = ctx->config[EXTRA_MIME_TYPES]; |
---|
| 1834 | while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) { |
---|
| 1835 | // ext now points to the path suffix |
---|
| 1836 | ext = path + path_len - ext_vec.len; |
---|
| 1837 | if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) { |
---|
| 1838 | *vec = mime_vec; |
---|
| 1839 | return; |
---|
| 1840 | } |
---|
| 1841 | } |
---|
| 1842 | |
---|
| 1843 | // Now scan built-in mime types |
---|
| 1844 | for (i = 0; builtin_mime_types[i].extension != NULL; i++) { |
---|
| 1845 | ext = path + (path_len - builtin_mime_types[i].ext_len); |
---|
| 1846 | if (path_len > builtin_mime_types[i].ext_len && |
---|
| 1847 | mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) { |
---|
| 1848 | vec->ptr = builtin_mime_types[i].mime_type; |
---|
| 1849 | vec->len = builtin_mime_types[i].mime_type_len; |
---|
| 1850 | return; |
---|
| 1851 | } |
---|
| 1852 | } |
---|
| 1853 | |
---|
| 1854 | // Nothing found. Fall back to "text/plain" |
---|
| 1855 | vec->ptr = "text/plain"; |
---|
| 1856 | vec->len = 10; |
---|
| 1857 | } |
---|
| 1858 | |
---|
| 1859 | #ifndef HAVE_MD5 |
---|
| 1860 | typedef struct MD5Context { |
---|
| 1861 | uint32_t buf[4]; |
---|
| 1862 | uint32_t bits[2]; |
---|
| 1863 | unsigned char in[64]; |
---|
| 1864 | } MD5_CTX; |
---|
| 1865 | |
---|
| 1866 | #if defined(__BYTE_ORDER) && (__BYTE_ORDER == 1234) |
---|
| 1867 | #define byteReverse(buf, len) // Do nothing |
---|
| 1868 | #else |
---|
| 1869 | static void byteReverse(unsigned char *buf, unsigned longs) { |
---|
| 1870 | uint32_t t; |
---|
| 1871 | do { |
---|
| 1872 | t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 | |
---|
| 1873 | ((unsigned) buf[1] << 8 | buf[0]); |
---|
| 1874 | *(uint32_t *) buf = t; |
---|
| 1875 | buf += 4; |
---|
| 1876 | } while (--longs); |
---|
| 1877 | } |
---|
| 1878 | #endif |
---|
| 1879 | |
---|
| 1880 | #define F1(x, y, z) (z ^ (x & (y ^ z))) |
---|
| 1881 | #define F2(x, y, z) F1(z, x, y) |
---|
| 1882 | #define F3(x, y, z) (x ^ y ^ z) |
---|
| 1883 | #define F4(x, y, z) (y ^ (x | ~z)) |
---|
| 1884 | |
---|
| 1885 | #define MD5STEP(f, w, x, y, z, data, s) \ |
---|
| 1886 | ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) |
---|
| 1887 | |
---|
| 1888 | // Start MD5 accumulation. Set bit count to 0 and buffer to mysterious |
---|
| 1889 | // initialization constants. |
---|
| 1890 | static void MD5Init(MD5_CTX *ctx) { |
---|
| 1891 | ctx->buf[0] = 0x67452301; |
---|
| 1892 | ctx->buf[1] = 0xefcdab89; |
---|
| 1893 | ctx->buf[2] = 0x98badcfe; |
---|
| 1894 | ctx->buf[3] = 0x10325476; |
---|
| 1895 | |
---|
| 1896 | ctx->bits[0] = 0; |
---|
| 1897 | ctx->bits[1] = 0; |
---|
| 1898 | } |
---|
| 1899 | |
---|
| 1900 | static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) { |
---|
| 1901 | register uint32_t a, b, c, d; |
---|
| 1902 | |
---|
| 1903 | a = buf[0]; |
---|
| 1904 | b = buf[1]; |
---|
| 1905 | c = buf[2]; |
---|
| 1906 | d = buf[3]; |
---|
| 1907 | |
---|
| 1908 | MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); |
---|
| 1909 | MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); |
---|
| 1910 | MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); |
---|
| 1911 | MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); |
---|
| 1912 | MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); |
---|
| 1913 | MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); |
---|
| 1914 | MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); |
---|
| 1915 | MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); |
---|
| 1916 | MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); |
---|
| 1917 | MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); |
---|
| 1918 | MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); |
---|
| 1919 | MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); |
---|
| 1920 | MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); |
---|
| 1921 | MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); |
---|
| 1922 | MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); |
---|
| 1923 | MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); |
---|
| 1924 | |
---|
| 1925 | MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); |
---|
| 1926 | MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); |
---|
| 1927 | MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); |
---|
| 1928 | MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); |
---|
| 1929 | MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); |
---|
| 1930 | MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); |
---|
| 1931 | MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); |
---|
| 1932 | MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); |
---|
| 1933 | MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); |
---|
| 1934 | MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); |
---|
| 1935 | MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); |
---|
| 1936 | MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); |
---|
| 1937 | MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); |
---|
| 1938 | MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); |
---|
| 1939 | MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); |
---|
| 1940 | MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); |
---|
| 1941 | |
---|
| 1942 | MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); |
---|
| 1943 | MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); |
---|
| 1944 | MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); |
---|
| 1945 | MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); |
---|
| 1946 | MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); |
---|
| 1947 | MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); |
---|
| 1948 | MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); |
---|
| 1949 | MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); |
---|
| 1950 | MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); |
---|
| 1951 | MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); |
---|
| 1952 | MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); |
---|
| 1953 | MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); |
---|
| 1954 | MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); |
---|
| 1955 | MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); |
---|
| 1956 | MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); |
---|
| 1957 | MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); |
---|
| 1958 | |
---|
| 1959 | MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); |
---|
| 1960 | MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); |
---|
| 1961 | MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); |
---|
| 1962 | MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); |
---|
| 1963 | MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); |
---|
| 1964 | MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); |
---|
| 1965 | MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); |
---|
| 1966 | MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); |
---|
| 1967 | MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); |
---|
| 1968 | MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); |
---|
| 1969 | MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); |
---|
| 1970 | MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); |
---|
| 1971 | MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); |
---|
| 1972 | MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); |
---|
| 1973 | MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); |
---|
| 1974 | MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); |
---|
| 1975 | |
---|
| 1976 | buf[0] += a; |
---|
| 1977 | buf[1] += b; |
---|
| 1978 | buf[2] += c; |
---|
| 1979 | buf[3] += d; |
---|
| 1980 | } |
---|
| 1981 | |
---|
| 1982 | static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) { |
---|
| 1983 | uint32_t t; |
---|
| 1984 | |
---|
| 1985 | t = ctx->bits[0]; |
---|
| 1986 | if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) |
---|
| 1987 | ctx->bits[1]++; |
---|
| 1988 | ctx->bits[1] += len >> 29; |
---|
| 1989 | |
---|
| 1990 | t = (t >> 3) & 0x3f; |
---|
| 1991 | |
---|
| 1992 | if (t) { |
---|
| 1993 | unsigned char *p = (unsigned char *) ctx->in + t; |
---|
| 1994 | |
---|
| 1995 | t = 64 - t; |
---|
| 1996 | if (len < t) { |
---|
| 1997 | memcpy(p, buf, len); |
---|
| 1998 | return; |
---|
| 1999 | } |
---|
| 2000 | memcpy(p, buf, t); |
---|
| 2001 | byteReverse(ctx->in, 16); |
---|
| 2002 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
| 2003 | buf += t; |
---|
| 2004 | len -= t; |
---|
| 2005 | } |
---|
| 2006 | |
---|
| 2007 | while (len >= 64) { |
---|
| 2008 | memcpy(ctx->in, buf, 64); |
---|
| 2009 | byteReverse(ctx->in, 16); |
---|
| 2010 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
| 2011 | buf += 64; |
---|
| 2012 | len -= 64; |
---|
| 2013 | } |
---|
| 2014 | |
---|
| 2015 | memcpy(ctx->in, buf, len); |
---|
| 2016 | } |
---|
| 2017 | |
---|
| 2018 | static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) { |
---|
| 2019 | unsigned count; |
---|
| 2020 | unsigned char *p; |
---|
| 2021 | |
---|
| 2022 | count = (ctx->bits[0] >> 3) & 0x3F; |
---|
| 2023 | |
---|
| 2024 | p = ctx->in + count; |
---|
| 2025 | *p++ = 0x80; |
---|
| 2026 | count = 64 - 1 - count; |
---|
| 2027 | if (count < 8) { |
---|
| 2028 | memset(p, 0, count); |
---|
| 2029 | byteReverse(ctx->in, 16); |
---|
| 2030 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
| 2031 | memset(ctx->in, 0, 56); |
---|
| 2032 | } else { |
---|
| 2033 | memset(p, 0, count - 8); |
---|
| 2034 | } |
---|
| 2035 | byteReverse(ctx->in, 14); |
---|
| 2036 | |
---|
| 2037 | ((uint32_t *) ctx->in)[14] = ctx->bits[0]; |
---|
| 2038 | ((uint32_t *) ctx->in)[15] = ctx->bits[1]; |
---|
| 2039 | |
---|
| 2040 | MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
---|
| 2041 | byteReverse((unsigned char *) ctx->buf, 4); |
---|
| 2042 | memcpy(digest, ctx->buf, 16); |
---|
| 2043 | memset((char *) ctx, 0, sizeof(*ctx)); |
---|
| 2044 | } |
---|
| 2045 | #endif // !HAVE_MD5 |
---|
| 2046 | |
---|
| 2047 | // Stringify binary data. Output buffer must be twice as big as input, |
---|
| 2048 | // because each byte takes 2 bytes in string representation |
---|
| 2049 | static void bin2str(char *to, const unsigned char *p, size_t len) { |
---|
| 2050 | static const char *hex = "0123456789abcdef"; |
---|
| 2051 | |
---|
| 2052 | for (; len--; p++) { |
---|
| 2053 | *to++ = hex[p[0] >> 4]; |
---|
| 2054 | *to++ = hex[p[0] & 0x0f]; |
---|
| 2055 | } |
---|
| 2056 | *to = '\0'; |
---|
| 2057 | } |
---|
| 2058 | |
---|
| 2059 | // Return stringified MD5 hash for list of vectors. Buffer must be 33 bytes. |
---|
| 2060 | void mg_md5(char *buf, ...) { |
---|
| 2061 | unsigned char hash[16]; |
---|
| 2062 | const char *p; |
---|
| 2063 | va_list ap; |
---|
| 2064 | MD5_CTX ctx; |
---|
| 2065 | |
---|
| 2066 | MD5Init(&ctx); |
---|
| 2067 | |
---|
| 2068 | va_start(ap, buf); |
---|
| 2069 | while ((p = va_arg(ap, const char *)) != NULL) { |
---|
| 2070 | MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p)); |
---|
| 2071 | } |
---|
| 2072 | va_end(ap); |
---|
| 2073 | |
---|
| 2074 | MD5Final(hash, &ctx); |
---|
| 2075 | bin2str(buf, hash, sizeof(hash)); |
---|
| 2076 | } |
---|
| 2077 | |
---|
| 2078 | // Check the user's password, return 1 if OK |
---|
| 2079 | static int check_password(const char *method, const char *ha1, const char *uri, |
---|
| 2080 | const char *nonce, const char *nc, const char *cnonce, |
---|
| 2081 | const char *qop, const char *response) { |
---|
| 2082 | char ha2[32 + 1], expected_response[32 + 1]; |
---|
| 2083 | |
---|
| 2084 | // Some of the parameters may be NULL |
---|
| 2085 | if (method == NULL || nonce == NULL || nc == NULL || cnonce == NULL || |
---|
| 2086 | qop == NULL || response == NULL) { |
---|
| 2087 | return 0; |
---|
| 2088 | } |
---|
| 2089 | |
---|
| 2090 | // NOTE(lsm): due to a bug in MSIE, we do not compare the URI |
---|
| 2091 | // TODO(lsm): check for authentication timeout |
---|
| 2092 | if (// strcmp(dig->uri, c->ouri) != 0 || |
---|
| 2093 | strlen(response) != 32 |
---|
| 2094 | // || now - strtoul(dig->nonce, NULL, 10) > 3600 |
---|
| 2095 | ) { |
---|
| 2096 | return 0; |
---|
| 2097 | } |
---|
| 2098 | |
---|
| 2099 | mg_md5(ha2, method, ":", uri, NULL); |
---|
| 2100 | mg_md5(expected_response, ha1, ":", nonce, ":", nc, |
---|
| 2101 | ":", cnonce, ":", qop, ":", ha2, NULL); |
---|
| 2102 | |
---|
| 2103 | return mg_strcasecmp(response, expected_response) == 0; |
---|
| 2104 | } |
---|
| 2105 | |
---|
| 2106 | // Use the global passwords file, if specified by auth_gpass option, |
---|
| 2107 | // or search for .htpasswd in the requested directory. |
---|
| 2108 | static FILE *open_auth_file(struct mg_connection *conn, const char *path) { |
---|
| 2109 | struct mg_context *ctx = conn->ctx; |
---|
| 2110 | char name[PATH_MAX]; |
---|
| 2111 | const char *p, *e; |
---|
| 2112 | struct mgstat st; |
---|
| 2113 | FILE *fp; |
---|
| 2114 | |
---|
| 2115 | if (ctx->config[GLOBAL_PASSWORDS_FILE] != NULL) { |
---|
| 2116 | // Use global passwords file |
---|
| 2117 | fp = mg_fopen(ctx->config[GLOBAL_PASSWORDS_FILE], "r"); |
---|
| 2118 | if (fp == NULL) |
---|
| 2119 | cry(fc(ctx), "fopen(%s): %s", |
---|
| 2120 | ctx->config[GLOBAL_PASSWORDS_FILE], strerror(ERRNO)); |
---|
| 2121 | } else if (!mg_stat(path, &st) && st.is_directory) { |
---|
| 2122 | (void) mg_snprintf(conn, name, sizeof(name), "%s%c%s", |
---|
| 2123 | path, DIRSEP, PASSWORDS_FILE_NAME); |
---|
| 2124 | fp = mg_fopen(name, "r"); |
---|
| 2125 | } else { |
---|
| 2126 | // Try to find .htpasswd in requested directory. |
---|
| 2127 | for (p = path, e = p + strlen(p) - 1; e > p; e--) |
---|
| 2128 | if (IS_DIRSEP_CHAR(*e)) |
---|
| 2129 | break; |
---|
| 2130 | (void) mg_snprintf(conn, name, sizeof(name), "%.*s%c%s", |
---|
| 2131 | (int) (e - p), p, DIRSEP, PASSWORDS_FILE_NAME); |
---|
| 2132 | fp = mg_fopen(name, "r"); |
---|
| 2133 | } |
---|
| 2134 | |
---|
| 2135 | return fp; |
---|
| 2136 | } |
---|
| 2137 | |
---|
| 2138 | // Parsed Authorization header |
---|
| 2139 | struct ah { |
---|
| 2140 | char *user, *uri, *cnonce, *response, *qop, *nc, *nonce; |
---|
| 2141 | }; |
---|
| 2142 | |
---|
| 2143 | static int parse_auth_header(struct mg_connection *conn, char *buf, |
---|
| 2144 | size_t buf_size, struct ah *ah) { |
---|
| 2145 | char *name, *value, *s; |
---|
| 2146 | const char *auth_header; |
---|
| 2147 | |
---|
| 2148 | if ((auth_header = mg_get_header(conn, "Authorization")) == NULL || |
---|
| 2149 | mg_strncasecmp(auth_header, "Digest ", 7) != 0) { |
---|
| 2150 | return 0; |
---|
| 2151 | } |
---|
| 2152 | |
---|
| 2153 | // Make modifiable copy of the auth header |
---|
| 2154 | (void) mg_strlcpy(buf, auth_header + 7, buf_size); |
---|
| 2155 | |
---|
| 2156 | s = buf; |
---|
| 2157 | (void) memset(ah, 0, sizeof(*ah)); |
---|
| 2158 | |
---|
| 2159 | // Parse authorization header |
---|
| 2160 | for (;;) { |
---|
| 2161 | // Gobble initial spaces |
---|
| 2162 | while (isspace(* (unsigned char *) s)) { |
---|
| 2163 | s++; |
---|
| 2164 | } |
---|
| 2165 | name = skip_quoted(&s, "=", " ", 0); |
---|
| 2166 | // Value is either quote-delimited, or ends at first comma or space. |
---|
| 2167 | if (s[0] == '\"') { |
---|
| 2168 | s++; |
---|
| 2169 | value = skip_quoted(&s, "\"", " ", '\\'); |
---|
| 2170 | if (s[0] == ',') { |
---|
| 2171 | s++; |
---|
| 2172 | } |
---|
| 2173 | } else { |
---|
| 2174 | value = skip_quoted(&s, ", ", " ", 0); // IE uses commas, FF uses spaces |
---|
| 2175 | } |
---|
| 2176 | if (*name == '\0') { |
---|
| 2177 | break; |
---|
| 2178 | } |
---|
| 2179 | |
---|
| 2180 | if (!strcmp(name, "username")) { |
---|
| 2181 | ah->user = value; |
---|
| 2182 | } else if (!strcmp(name, "cnonce")) { |
---|
| 2183 | ah->cnonce = value; |
---|
| 2184 | } else if (!strcmp(name, "response")) { |
---|
| 2185 | ah->response = value; |
---|
| 2186 | } else if (!strcmp(name, "uri")) { |
---|
| 2187 | ah->uri = value; |
---|
| 2188 | } else if (!strcmp(name, "qop")) { |
---|
| 2189 | ah->qop = value; |
---|
| 2190 | } else if (!strcmp(name, "nc")) { |
---|
| 2191 | ah->nc = value; |
---|
| 2192 | } else if (!strcmp(name, "nonce")) { |
---|
| 2193 | ah->nonce = value; |
---|
| 2194 | } |
---|
| 2195 | } |
---|
| 2196 | |
---|
| 2197 | // CGI needs it as REMOTE_USER |
---|
| 2198 | if (ah->user != NULL) { |
---|
| 2199 | conn->request_info.remote_user = mg_strdup(ah->user); |
---|
| 2200 | } else { |
---|
| 2201 | return 0; |
---|
| 2202 | } |
---|
| 2203 | |
---|
| 2204 | return 1; |
---|
| 2205 | } |
---|
| 2206 | |
---|
| 2207 | // Authorize against the opened passwords file. Return 1 if authorized. |
---|
| 2208 | static int authorize(struct mg_connection *conn, FILE *fp) { |
---|
| 2209 | struct ah ah; |
---|
| 2210 | char line[256], f_user[256], ha1[256], f_domain[256], buf[BUFSIZ]; |
---|
| 2211 | |
---|
| 2212 | if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) { |
---|
| 2213 | return 0; |
---|
| 2214 | } |
---|
| 2215 | |
---|
| 2216 | // Loop over passwords file |
---|
| 2217 | while (fgets(line, sizeof(line), fp) != NULL) { |
---|
| 2218 | if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) != 3) { |
---|
| 2219 | continue; |
---|
| 2220 | } |
---|
| 2221 | |
---|
| 2222 | if (!strcmp(ah.user, f_user) && |
---|
| 2223 | !strcmp(conn->ctx->config[AUTHENTICATION_DOMAIN], f_domain)) |
---|
| 2224 | return check_password( |
---|
| 2225 | conn->request_info.request_method, |
---|
| 2226 | ha1, ah.uri, ah.nonce, ah.nc, ah.cnonce, ah.qop, |
---|
| 2227 | ah.response); |
---|
| 2228 | } |
---|
| 2229 | |
---|
| 2230 | return 0; |
---|
| 2231 | } |
---|
| 2232 | |
---|
| 2233 | // Return 1 if request is authorised, 0 otherwise. |
---|
| 2234 | static int check_authorization(struct mg_connection *conn, const char *path) { |
---|
| 2235 | FILE *fp; |
---|
| 2236 | char fname[PATH_MAX]; |
---|
| 2237 | struct vec uri_vec, filename_vec; |
---|
| 2238 | const char *list; |
---|
| 2239 | int authorized; |
---|
| 2240 | |
---|
| 2241 | fp = NULL; |
---|
| 2242 | authorized = 1; |
---|
| 2243 | |
---|
| 2244 | list = conn->ctx->config[PROTECT_URI]; |
---|
| 2245 | while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) { |
---|
| 2246 | if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) { |
---|
| 2247 | (void) mg_snprintf(conn, fname, sizeof(fname), "%.*s", |
---|
| 2248 | filename_vec.len, filename_vec.ptr); |
---|
| 2249 | if ((fp = mg_fopen(fname, "r")) == NULL) { |
---|
| 2250 | cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno)); |
---|
| 2251 | } |
---|
| 2252 | break; |
---|
| 2253 | } |
---|
| 2254 | } |
---|
| 2255 | |
---|
| 2256 | if (fp == NULL) { |
---|
| 2257 | fp = open_auth_file(conn, path); |
---|
| 2258 | } |
---|
| 2259 | |
---|
| 2260 | if (fp != NULL) { |
---|
| 2261 | authorized = authorize(conn, fp); |
---|
| 2262 | (void) fclose(fp); |
---|
| 2263 | } |
---|
| 2264 | |
---|
| 2265 | return authorized; |
---|
| 2266 | } |
---|
| 2267 | |
---|
| 2268 | static void send_authorization_request(struct mg_connection *conn) { |
---|
| 2269 | conn->request_info.status_code = 401; |
---|
| 2270 | (void) mg_printf(conn, |
---|
| 2271 | "HTTP/1.1 401 Unauthorized\r\n" |
---|
| 2272 | "Content-Length: 0\r\n" |
---|
| 2273 | "WWW-Authenticate: Digest qop=\"auth\", " |
---|
| 2274 | "realm=\"%s\", nonce=\"%lu\"\r\n\r\n", |
---|
| 2275 | conn->ctx->config[AUTHENTICATION_DOMAIN], |
---|
| 2276 | (unsigned long) time(NULL)); |
---|
| 2277 | } |
---|
| 2278 | |
---|
| 2279 | static int is_authorized_for_put(struct mg_connection *conn) { |
---|
| 2280 | FILE *fp; |
---|
| 2281 | int ret = 0; |
---|
| 2282 | |
---|
| 2283 | fp = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ? NULL : |
---|
| 2284 | mg_fopen(conn->ctx->config[PUT_DELETE_PASSWORDS_FILE], "r"); |
---|
| 2285 | |
---|
| 2286 | if (fp != NULL) { |
---|
| 2287 | ret = authorize(conn, fp); |
---|
| 2288 | (void) fclose(fp); |
---|
| 2289 | } |
---|
| 2290 | |
---|
| 2291 | return ret; |
---|
| 2292 | } |
---|
| 2293 | |
---|
| 2294 | int mg_modify_passwords_file(const char *fname, const char *domain, |
---|
| 2295 | const char *user, const char *pass) { |
---|
| 2296 | int found; |
---|
| 2297 | char line[512], u[512], d[512], ha1[33], tmp[PATH_MAX]; |
---|
| 2298 | FILE *fp, *fp2; |
---|
| 2299 | |
---|
| 2300 | found = 0; |
---|
| 2301 | fp = fp2 = NULL; |
---|
| 2302 | |
---|
| 2303 | // Regard empty password as no password - remove user record. |
---|
| 2304 | if (pass != NULL && pass[0] == '\0') { |
---|
| 2305 | pass = NULL; |
---|
| 2306 | } |
---|
| 2307 | |
---|
| 2308 | (void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname); |
---|
| 2309 | |
---|
| 2310 | // Create the file if does not exist |
---|
| 2311 | if ((fp = mg_fopen(fname, "a+")) != NULL) { |
---|
| 2312 | (void) fclose(fp); |
---|
| 2313 | } |
---|
| 2314 | |
---|
| 2315 | // Open the given file and temporary file |
---|
| 2316 | if ((fp = mg_fopen(fname, "r")) == NULL) { |
---|
| 2317 | return 0; |
---|
| 2318 | } else if ((fp2 = mg_fopen(tmp, "w+")) == NULL) { |
---|
| 2319 | fclose(fp); |
---|
| 2320 | return 0; |
---|
| 2321 | } |
---|
| 2322 | |
---|
| 2323 | // Copy the stuff to temporary file |
---|
| 2324 | while (fgets(line, sizeof(line), fp) != NULL) { |
---|
| 2325 | if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) { |
---|
| 2326 | continue; |
---|
| 2327 | } |
---|
| 2328 | |
---|
| 2329 | if (!strcmp(u, user) && !strcmp(d, domain)) { |
---|
| 2330 | found++; |
---|
| 2331 | if (pass != NULL) { |
---|
| 2332 | mg_md5(ha1, user, ":", domain, ":", pass, NULL); |
---|
| 2333 | fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); |
---|
| 2334 | } |
---|
| 2335 | } else { |
---|
| 2336 | (void) fprintf(fp2, "%s", line); |
---|
| 2337 | } |
---|
| 2338 | } |
---|
| 2339 | |
---|
| 2340 | // If new user, just add it |
---|
| 2341 | if (!found && pass != NULL) { |
---|
| 2342 | mg_md5(ha1, user, ":", domain, ":", pass, NULL); |
---|
| 2343 | (void) fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); |
---|
| 2344 | } |
---|
| 2345 | |
---|
| 2346 | // Close files |
---|
| 2347 | (void) fclose(fp); |
---|
| 2348 | (void) fclose(fp2); |
---|
| 2349 | |
---|
| 2350 | // Put the temp file in place of real file |
---|
| 2351 | (void) mg_remove(fname); |
---|
| 2352 | (void) mg_rename(tmp, fname); |
---|
| 2353 | |
---|
| 2354 | return 1; |
---|
| 2355 | } |
---|
| 2356 | |
---|
| 2357 | struct de { |
---|
| 2358 | struct mg_connection *conn; |
---|
| 2359 | char *file_name; |
---|
| 2360 | struct mgstat st; |
---|
| 2361 | }; |
---|
| 2362 | |
---|
| 2363 | static void url_encode(const char *src, char *dst, size_t dst_len) { |
---|
| 2364 | static const char *dont_escape = "._-$,;~()"; |
---|
| 2365 | static const char *hex = "0123456789abcdef"; |
---|
| 2366 | const char *end = dst + dst_len - 1; |
---|
| 2367 | |
---|
| 2368 | for (; *src != '\0' && dst < end; src++, dst++) { |
---|
| 2369 | if (isalnum(*(const unsigned char *) src) || |
---|
| 2370 | strchr(dont_escape, * (const unsigned char *) src) != NULL) { |
---|
| 2371 | *dst = *src; |
---|
| 2372 | } else if (dst + 2 < end) { |
---|
| 2373 | dst[0] = '%'; |
---|
| 2374 | dst[1] = hex[(* (const unsigned char *) src) >> 4]; |
---|
| 2375 | dst[2] = hex[(* (const unsigned char *) src) & 0xf]; |
---|
| 2376 | dst += 2; |
---|
| 2377 | } |
---|
| 2378 | } |
---|
| 2379 | |
---|
| 2380 | *dst = '\0'; |
---|
| 2381 | } |
---|
| 2382 | |
---|
| 2383 | static void print_dir_entry(struct de *de) { |
---|
| 2384 | char size[64], mod[64], href[PATH_MAX]; |
---|
| 2385 | |
---|
| 2386 | if (de->st.is_directory) { |
---|
| 2387 | (void) mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]"); |
---|
| 2388 | } else { |
---|
| 2389 | // We use (signed) cast below because MSVC 6 compiler cannot |
---|
| 2390 | // convert unsigned __int64 to double. Sigh. |
---|
| 2391 | if (de->st.size < 1024) { |
---|
| 2392 | (void) mg_snprintf(de->conn, size, sizeof(size), |
---|
| 2393 | "%lu", (unsigned long) de->st.size); |
---|
| 2394 | } else if (de->st.size < 1024 * 1024) { |
---|
| 2395 | (void) mg_snprintf(de->conn, size, sizeof(size), |
---|
| 2396 | "%.1fk", (double) de->st.size / 1024.0); |
---|
| 2397 | } else if (de->st.size < 1024 * 1024 * 1024) { |
---|
| 2398 | (void) mg_snprintf(de->conn, size, sizeof(size), |
---|
| 2399 | "%.1fM", (double) de->st.size / 1048576); |
---|
| 2400 | } else { |
---|
| 2401 | (void) mg_snprintf(de->conn, size, sizeof(size), |
---|
| 2402 | "%.1fG", (double) de->st.size / 1073741824); |
---|
| 2403 | } |
---|
| 2404 | } |
---|
| 2405 | (void) strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.mtime)); |
---|
| 2406 | url_encode(de->file_name, href, sizeof(href)); |
---|
| 2407 | de->conn->num_bytes_sent += mg_printf(de->conn, |
---|
| 2408 | "<tr><td><a href=\"%s%s%s\">%s%s</a></td>" |
---|
| 2409 | "<td> %s</td><td> %s</td></tr>\n", |
---|
| 2410 | de->conn->request_info.uri, href, de->st.is_directory ? "/" : "", |
---|
| 2411 | de->file_name, de->st.is_directory ? "/" : "", mod, size); |
---|
| 2412 | } |
---|
| 2413 | |
---|
| 2414 | // This function is called from send_directory() and used for |
---|
| 2415 | // sorting directory entries by size, or name, or modification time. |
---|
| 2416 | // On windows, __cdecl specification is needed in case if project is built |
---|
| 2417 | // with __stdcall convention. qsort always requires __cdels callback. |
---|
| 2418 | static int WINCDECL compare_dir_entries(const void *p1, const void *p2) { |
---|
| 2419 | const struct de *a = (const struct de *) p1, *b = (const struct de *) p2; |
---|
| 2420 | const char *query_string = a->conn->request_info.query_string; |
---|
| 2421 | int cmp_result = 0; |
---|
| 2422 | |
---|
| 2423 | if (query_string == NULL) { |
---|
| 2424 | query_string = "na"; |
---|
| 2425 | } |
---|
| 2426 | |
---|
| 2427 | if (a->st.is_directory && !b->st.is_directory) { |
---|
| 2428 | return -1; // Always put directories on top |
---|
| 2429 | } else if (!a->st.is_directory && b->st.is_directory) { |
---|
| 2430 | return 1; // Always put directories on top |
---|
| 2431 | } else if (*query_string == 'n') { |
---|
| 2432 | cmp_result = strcmp(a->file_name, b->file_name); |
---|
| 2433 | } else if (*query_string == 's') { |
---|
| 2434 | cmp_result = a->st.size == b->st.size ? 0 : |
---|
| 2435 | a->st.size > b->st.size ? 1 : -1; |
---|
| 2436 | } else if (*query_string == 'd') { |
---|
| 2437 | cmp_result = a->st.mtime == b->st.mtime ? 0 : |
---|
| 2438 | a->st.mtime > b->st.mtime ? 1 : -1; |
---|
| 2439 | } |
---|
| 2440 | |
---|
| 2441 | return query_string[1] == 'd' ? -cmp_result : cmp_result; |
---|
| 2442 | } |
---|
| 2443 | |
---|
| 2444 | static int scan_directory(struct mg_connection *conn, const char *dir, |
---|
| 2445 | void *data, void (*cb)(struct de *, void *)) { |
---|
| 2446 | char path[PATH_MAX]; |
---|
| 2447 | struct dirent *dp; |
---|
| 2448 | DIR *dirp; |
---|
| 2449 | struct de de; |
---|
| 2450 | |
---|
| 2451 | if ((dirp = opendir(dir)) == NULL) { |
---|
| 2452 | return 0; |
---|
| 2453 | } else { |
---|
| 2454 | de.conn = conn; |
---|
| 2455 | |
---|
| 2456 | while ((dp = readdir(dirp)) != NULL) { |
---|
| 2457 | // Do not show current dir and passwords file |
---|
| 2458 | if (!strcmp(dp->d_name, ".") || |
---|
| 2459 | !strcmp(dp->d_name, "..") || |
---|
| 2460 | !strcmp(dp->d_name, PASSWORDS_FILE_NAME)) |
---|
| 2461 | continue; |
---|
| 2462 | |
---|
| 2463 | mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, DIRSEP, dp->d_name); |
---|
| 2464 | |
---|
| 2465 | // If we don't memset stat structure to zero, mtime will have |
---|
| 2466 | // garbage and strftime() will segfault later on in |
---|
| 2467 | // print_dir_entry(). memset is required only if mg_stat() |
---|
| 2468 | // fails. For more details, see |
---|
| 2469 | // http://code.google.com/p/mongoose/issues/detail?id=79 |
---|
| 2470 | if (mg_stat(path, &de.st) != 0) { |
---|
| 2471 | memset(&de.st, 0, sizeof(de.st)); |
---|
| 2472 | } |
---|
| 2473 | de.file_name = dp->d_name; |
---|
| 2474 | |
---|
| 2475 | cb(&de, data); |
---|
| 2476 | } |
---|
| 2477 | (void) closedir(dirp); |
---|
| 2478 | } |
---|
| 2479 | return 1; |
---|
| 2480 | } |
---|
| 2481 | |
---|
| 2482 | struct dir_scan_data { |
---|
| 2483 | struct de *entries; |
---|
| 2484 | int num_entries; |
---|
| 2485 | int arr_size; |
---|
| 2486 | }; |
---|
| 2487 | |
---|
| 2488 | static void dir_scan_callback(struct de *de, void *data) { |
---|
| 2489 | struct dir_scan_data *dsd = (struct dir_scan_data *) data; |
---|
| 2490 | |
---|
| 2491 | if (dsd->entries == NULL || dsd->num_entries >= dsd->arr_size) { |
---|
| 2492 | dsd->arr_size *= 2; |
---|
| 2493 | dsd->entries = (struct de *) realloc(dsd->entries, dsd->arr_size * |
---|
| 2494 | sizeof(dsd->entries[0])); |
---|
| 2495 | } |
---|
| 2496 | if (dsd->entries == NULL) { |
---|
| 2497 | // TODO(lsm): propagate an error to the caller |
---|
| 2498 | dsd->num_entries = 0; |
---|
| 2499 | } else { |
---|
| 2500 | dsd->entries[dsd->num_entries].file_name = mg_strdup(de->file_name); |
---|
| 2501 | dsd->entries[dsd->num_entries].st = de->st; |
---|
| 2502 | dsd->entries[dsd->num_entries].conn = de->conn; |
---|
| 2503 | dsd->num_entries++; |
---|
| 2504 | } |
---|
| 2505 | } |
---|
| 2506 | |
---|
| 2507 | static void handle_directory_request(struct mg_connection *conn, |
---|
| 2508 | const char *dir) { |
---|
| 2509 | int i, sort_direction; |
---|
| 2510 | struct dir_scan_data data = { NULL, 0, 128 }; |
---|
| 2511 | |
---|
| 2512 | if (!scan_directory(conn, dir, &data, dir_scan_callback)) { |
---|
| 2513 | send_http_error(conn, 500, "Cannot open directory", |
---|
| 2514 | "Error: opendir(%s): %s", dir, strerror(ERRNO)); |
---|
| 2515 | return; |
---|
| 2516 | } |
---|
| 2517 | |
---|
| 2518 | sort_direction = conn->request_info.query_string != NULL && |
---|
| 2519 | conn->request_info.query_string[1] == 'd' ? 'a' : 'd'; |
---|
| 2520 | |
---|
| 2521 | conn->must_close = 1; |
---|
| 2522 | mg_printf(conn, "%s", |
---|
| 2523 | "HTTP/1.1 200 OK\r\n" |
---|
| 2524 | "Connection: close\r\n" |
---|
| 2525 | "Content-Type: text/html; charset=utf-8\r\n\r\n"); |
---|
| 2526 | |
---|
| 2527 | conn->num_bytes_sent += mg_printf(conn, |
---|
| 2528 | "<html><head><title>Index of %s</title>" |
---|
| 2529 | "<style>th {text-align: left;}</style></head>" |
---|
| 2530 | "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">" |
---|
| 2531 | "<tr><th><a href=\"?n%c\">Name</a></th>" |
---|
| 2532 | "<th><a href=\"?d%c\">Modified</a></th>" |
---|
| 2533 | "<th><a href=\"?s%c\">Size</a></th></tr>" |
---|
| 2534 | "<tr><td colspan=\"3\"><hr></td></tr>", |
---|
| 2535 | conn->request_info.uri, conn->request_info.uri, |
---|
| 2536 | sort_direction, sort_direction, sort_direction); |
---|
| 2537 | |
---|
| 2538 | // Print first entry - link to a parent directory |
---|
| 2539 | conn->num_bytes_sent += mg_printf(conn, |
---|
| 2540 | "<tr><td><a href=\"%s%s\">%s</a></td>" |
---|
| 2541 | "<td> %s</td><td> %s</td></tr>\n", |
---|
| 2542 | conn->request_info.uri, "..", "Parent directory", "-", "-"); |
---|
| 2543 | |
---|
| 2544 | // Sort and print directory entries |
---|
| 2545 | qsort(data.entries, (size_t) data.num_entries, sizeof(data.entries[0]), |
---|
| 2546 | compare_dir_entries); |
---|
| 2547 | for (i = 0; i < data.num_entries; i++) { |
---|
| 2548 | print_dir_entry(&data.entries[i]); |
---|
| 2549 | free(data.entries[i].file_name); |
---|
| 2550 | } |
---|
| 2551 | free(data.entries); |
---|
| 2552 | |
---|
| 2553 | conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>"); |
---|
| 2554 | conn->request_info.status_code = 200; |
---|
| 2555 | } |
---|
| 2556 | |
---|
| 2557 | // Send len bytes from the opened file to the client. |
---|
| 2558 | static void send_file_data(struct mg_connection *conn, FILE *fp, int64_t len) { |
---|
| 2559 | char buf[BUFSIZ]; |
---|
| 2560 | int to_read, num_read, num_written; |
---|
| 2561 | |
---|
| 2562 | while (len > 0) { |
---|
| 2563 | // Calculate how much to read from the file in the buffer |
---|
| 2564 | to_read = sizeof(buf); |
---|
| 2565 | if ((int64_t) to_read > len) |
---|
| 2566 | to_read = (int) len; |
---|
| 2567 | |
---|
| 2568 | // Read from file, exit the loop on error |
---|
| 2569 | if ((num_read = fread(buf, 1, (size_t)to_read, fp)) == 0) |
---|
| 2570 | break; |
---|
| 2571 | |
---|
| 2572 | // Send read bytes to the client, exit the loop on error |
---|
| 2573 | if ((num_written = mg_write(conn, buf, (size_t)num_read)) != num_read) |
---|
| 2574 | break; |
---|
| 2575 | |
---|
| 2576 | // Both read and were successful, adjust counters |
---|
| 2577 | conn->num_bytes_sent += num_written; |
---|
| 2578 | len -= num_written; |
---|
| 2579 | } |
---|
| 2580 | } |
---|
| 2581 | |
---|
| 2582 | static int parse_range_header(const char *header, int64_t *a, int64_t *b) { |
---|
| 2583 | return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b); |
---|
| 2584 | } |
---|
| 2585 | |
---|
| 2586 | static void gmt_time_string(char *buf, size_t buf_len, time_t *t) { |
---|
| 2587 | strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t)); |
---|
| 2588 | } |
---|
| 2589 | |
---|
| 2590 | static void handle_file_request(struct mg_connection *conn, const char *path, |
---|
| 2591 | struct mgstat *stp) { |
---|
| 2592 | char date[64], lm[64], etag[64], range[64]; |
---|
| 2593 | const char *msg = "OK", *hdr; |
---|
| 2594 | time_t curtime = time(NULL); |
---|
| 2595 | int64_t cl, r1, r2; |
---|
| 2596 | struct vec mime_vec; |
---|
| 2597 | FILE *fp; |
---|
| 2598 | int n; |
---|
| 2599 | |
---|
| 2600 | get_mime_type(conn->ctx, path, &mime_vec); |
---|
| 2601 | cl = stp->size; |
---|
| 2602 | conn->request_info.status_code = 200; |
---|
| 2603 | range[0] = '\0'; |
---|
| 2604 | |
---|
| 2605 | if ((fp = mg_fopen(path, "rb")) == NULL) { |
---|
| 2606 | send_http_error(conn, 500, http_500_error, |
---|
| 2607 | "fopen(%s): %s", path, strerror(ERRNO)); |
---|
| 2608 | return; |
---|
| 2609 | } |
---|
| 2610 | set_close_on_exec(fileno(fp)); |
---|
| 2611 | |
---|
| 2612 | // If Range: header specified, act accordingly |
---|
| 2613 | r1 = r2 = 0; |
---|
| 2614 | hdr = mg_get_header(conn, "Range"); |
---|
| 2615 | if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0) { |
---|
| 2616 | conn->request_info.status_code = 206; |
---|
| 2617 | (void) fseeko(fp, (off_t) r1, SEEK_SET); |
---|
| 2618 | cl = n == 2 ? r2 - r1 + 1: cl - r1; |
---|
| 2619 | (void) mg_snprintf(conn, range, sizeof(range), |
---|
| 2620 | "Content-Range: bytes " |
---|
| 2621 | "%" INT64_FMT "-%" |
---|
| 2622 | INT64_FMT "/%" INT64_FMT "\r\n", |
---|
| 2623 | r1, r1 + cl - 1, stp->size); |
---|
| 2624 | msg = "Partial Content"; |
---|
| 2625 | } |
---|
| 2626 | |
---|
| 2627 | // Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to |
---|
| 2628 | // http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3 |
---|
| 2629 | gmt_time_string(date, sizeof(date), &curtime); |
---|
| 2630 | gmt_time_string(lm, sizeof(lm), &stp->mtime); |
---|
| 2631 | (void) mg_snprintf(conn, etag, sizeof(etag), "%lx.%lx", |
---|
| 2632 | (unsigned long) stp->mtime, (unsigned long) stp->size); |
---|
| 2633 | |
---|
| 2634 | (void) mg_printf(conn, |
---|
| 2635 | "HTTP/1.1 %d %s\r\n" |
---|
| 2636 | "Date: %s\r\n" |
---|
| 2637 | "Last-Modified: %s\r\n" |
---|
| 2638 | "Etag: \"%s\"\r\n" |
---|
| 2639 | "Content-Type: %.*s\r\n" |
---|
| 2640 | "Content-Length: %" INT64_FMT "\r\n" |
---|
| 2641 | "Connection: %s\r\n" |
---|
| 2642 | "Accept-Ranges: bytes\r\n" |
---|
| 2643 | "%s\r\n", |
---|
| 2644 | conn->request_info.status_code, msg, date, lm, etag, (int) mime_vec.len, |
---|
| 2645 | mime_vec.ptr, cl, suggest_connection_header(conn), range); |
---|
| 2646 | |
---|
| 2647 | if (strcmp(conn->request_info.request_method, "HEAD") != 0) { |
---|
| 2648 | send_file_data(conn, fp, cl); |
---|
| 2649 | } |
---|
| 2650 | (void) fclose(fp); |
---|
| 2651 | } |
---|
| 2652 | |
---|
| 2653 | void mg_send_file(struct mg_connection *conn, const char *path) { |
---|
| 2654 | struct mgstat st; |
---|
| 2655 | if (mg_stat(path, &st) == 0) { |
---|
| 2656 | handle_file_request(conn, path, &st); |
---|
| 2657 | } else { |
---|
| 2658 | send_http_error(conn, 404, "Not Found", "%s", "File not found"); |
---|
| 2659 | } |
---|
| 2660 | } |
---|
| 2661 | |
---|
| 2662 | |
---|
| 2663 | // Parse HTTP headers from the given buffer, advance buffer to the point |
---|
| 2664 | // where parsing stopped. |
---|
| 2665 | static void parse_http_headers(char **buf, struct mg_request_info *ri) { |
---|
| 2666 | int i; |
---|
| 2667 | |
---|
| 2668 | for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) { |
---|
| 2669 | ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0); |
---|
| 2670 | ri->http_headers[i].value = skip(buf, "\r\n"); |
---|
| 2671 | if (ri->http_headers[i].name[0] == '\0') |
---|
| 2672 | break; |
---|
| 2673 | ri->num_headers = i + 1; |
---|
| 2674 | } |
---|
| 2675 | } |
---|
| 2676 | |
---|
| 2677 | static int is_valid_http_method(const char *method) { |
---|
| 2678 | return !strcmp(method, "GET") || !strcmp(method, "POST") || |
---|
| 2679 | !strcmp(method, "HEAD") || !strcmp(method, "CONNECT") || |
---|
| 2680 | !strcmp(method, "PUT") || !strcmp(method, "DELETE") || |
---|
| 2681 | !strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND"); |
---|
| 2682 | } |
---|
| 2683 | |
---|
| 2684 | // Parse HTTP request, fill in mg_request_info structure. |
---|
| 2685 | static int parse_http_request(char *buf, struct mg_request_info *ri) { |
---|
| 2686 | int status = 0; |
---|
| 2687 | |
---|
| 2688 | // RFC says that all initial whitespaces should be ingored |
---|
| 2689 | while (*buf != '\0' && isspace(* (unsigned char *) buf)) { |
---|
| 2690 | buf++; |
---|
| 2691 | } |
---|
| 2692 | |
---|
| 2693 | ri->request_method = skip(&buf, " "); |
---|
| 2694 | ri->uri = skip(&buf, " "); |
---|
| 2695 | ri->http_version = skip(&buf, "\r\n"); |
---|
| 2696 | |
---|
| 2697 | if (is_valid_http_method(ri->request_method) && |
---|
| 2698 | strncmp(ri->http_version, "HTTP/", 5) == 0) { |
---|
| 2699 | ri->http_version += 5; // Skip "HTTP/" |
---|
| 2700 | parse_http_headers(&buf, ri); |
---|
| 2701 | status = 1; |
---|
| 2702 | } |
---|
| 2703 | |
---|
| 2704 | return status; |
---|
| 2705 | } |
---|
| 2706 | |
---|
| 2707 | // Keep reading the input (either opened file descriptor fd, or socket sock, |
---|
| 2708 | // or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the |
---|
| 2709 | // buffer (which marks the end of HTTP request). Buffer buf may already |
---|
| 2710 | // have some data. The length of the data is stored in nread. |
---|
| 2711 | // Upon every read operation, increase nread by the number of bytes read. |
---|
| 2712 | static int read_request(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int bufsiz, |
---|
| 2713 | int *nread) { |
---|
| 2714 | int request_len, n = 0; |
---|
| 2715 | |
---|
| 2716 | do { |
---|
| 2717 | request_len = get_request_len(buf, *nread); |
---|
| 2718 | if (request_len == 0 && |
---|
| 2719 | (n = pull(fp, sock, ssl, buf + *nread, bufsiz - *nread)) > 0) { |
---|
| 2720 | *nread += n; |
---|
| 2721 | } |
---|
| 2722 | } while (*nread < bufsiz && request_len == 0 && n > 0); |
---|
| 2723 | |
---|
| 2724 | return request_len; |
---|
| 2725 | } |
---|
| 2726 | |
---|
| 2727 | // For given directory path, substitute it to valid index file. |
---|
| 2728 | // Return 0 if index file has been found, -1 if not found. |
---|
| 2729 | // If the file is found, it's stats is returned in stp. |
---|
| 2730 | static int substitute_index_file(struct mg_connection *conn, char *path, |
---|
| 2731 | size_t path_len, struct mgstat *stp) { |
---|
| 2732 | const char *list = conn->ctx->config[INDEX_FILES]; |
---|
| 2733 | struct mgstat st; |
---|
| 2734 | struct vec filename_vec; |
---|
| 2735 | size_t n = strlen(path); |
---|
| 2736 | int found = 0; |
---|
| 2737 | |
---|
| 2738 | // The 'path' given to us points to the directory. Remove all trailing |
---|
| 2739 | // directory separator characters from the end of the path, and |
---|
| 2740 | // then append single directory separator character. |
---|
| 2741 | while (n > 0 && IS_DIRSEP_CHAR(path[n - 1])) { |
---|
| 2742 | n--; |
---|
| 2743 | } |
---|
| 2744 | path[n] = DIRSEP; |
---|
| 2745 | |
---|
| 2746 | // Traverse index files list. For each entry, append it to the given |
---|
| 2747 | // path and see if the file exists. If it exists, break the loop |
---|
| 2748 | while ((list = next_option(list, &filename_vec, NULL)) != NULL) { |
---|
| 2749 | |
---|
| 2750 | // Ignore too long entries that may overflow path buffer |
---|
| 2751 | if (filename_vec.len > path_len - (n + 2)) |
---|
| 2752 | continue; |
---|
| 2753 | |
---|
| 2754 | // Prepare full path to the index file |
---|
| 2755 | (void) mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1); |
---|
| 2756 | |
---|
| 2757 | // Does it exist? |
---|
| 2758 | if (mg_stat(path, &st) == 0) { |
---|
| 2759 | // Yes it does, break the loop |
---|
| 2760 | *stp = st; |
---|
| 2761 | found = 1; |
---|
| 2762 | break; |
---|
| 2763 | } |
---|
| 2764 | } |
---|
| 2765 | |
---|
| 2766 | // If no index file exists, restore directory path |
---|
| 2767 | if (!found) { |
---|
| 2768 | path[n] = '\0'; |
---|
| 2769 | } |
---|
| 2770 | |
---|
| 2771 | return found; |
---|
| 2772 | } |
---|
| 2773 | |
---|
| 2774 | // Return True if we should reply 304 Not Modified. |
---|
| 2775 | static int is_not_modified(const struct mg_connection *conn, |
---|
| 2776 | const struct mgstat *stp) { |
---|
| 2777 | const char *ims = mg_get_header(conn, "If-Modified-Since"); |
---|
| 2778 | return ims != NULL && stp->mtime <= parse_date_string(ims); |
---|
| 2779 | } |
---|
| 2780 | |
---|
| 2781 | static int forward_body_data(struct mg_connection *conn, FILE *fp, |
---|
| 2782 | SOCKET sock, SSL *ssl) { |
---|
| 2783 | const char *expect, *buffered; |
---|
| 2784 | char buf[BUFSIZ]; |
---|
| 2785 | int to_read, nread, buffered_len, success = 0; |
---|
| 2786 | |
---|
| 2787 | expect = mg_get_header(conn, "Expect"); |
---|
| 2788 | assert(fp != NULL); |
---|
| 2789 | |
---|
| 2790 | if (conn->content_len == -1) { |
---|
| 2791 | send_http_error(conn, 411, "Length Required", ""); |
---|
| 2792 | } else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) { |
---|
| 2793 | send_http_error(conn, 417, "Expectation Failed", ""); |
---|
| 2794 | } else { |
---|
| 2795 | if (expect != NULL) { |
---|
| 2796 | (void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n"); |
---|
| 2797 | } |
---|
| 2798 | |
---|
| 2799 | buffered = conn->buf + conn->request_len; |
---|
| 2800 | buffered_len = conn->data_len - conn->request_len; |
---|
| 2801 | assert(buffered_len >= 0); |
---|
| 2802 | assert(conn->consumed_content == 0); |
---|
| 2803 | |
---|
| 2804 | if (buffered_len > 0) { |
---|
| 2805 | if ((int64_t) buffered_len > conn->content_len) { |
---|
| 2806 | buffered_len = (int) conn->content_len; |
---|
| 2807 | } |
---|
| 2808 | push(fp, sock, ssl, buffered, (int64_t) buffered_len); |
---|
| 2809 | conn->consumed_content += buffered_len; |
---|
| 2810 | } |
---|
| 2811 | |
---|
| 2812 | while (conn->consumed_content < conn->content_len) { |
---|
| 2813 | to_read = sizeof(buf); |
---|
| 2814 | if ((int64_t) to_read > conn->content_len - conn->consumed_content) { |
---|
| 2815 | to_read = (int) (conn->content_len - conn->consumed_content); |
---|
| 2816 | } |
---|
| 2817 | nread = pull(NULL, conn->client.sock, conn->ssl, buf, to_read); |
---|
| 2818 | if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) { |
---|
| 2819 | break; |
---|
| 2820 | } |
---|
| 2821 | conn->consumed_content += nread; |
---|
| 2822 | } |
---|
| 2823 | |
---|
| 2824 | if (conn->consumed_content == conn->content_len) { |
---|
| 2825 | success = 1; |
---|
| 2826 | } |
---|
| 2827 | |
---|
| 2828 | // Each error code path in this function must send an error |
---|
| 2829 | if (!success) { |
---|
| 2830 | send_http_error(conn, 577, http_500_error, ""); |
---|
| 2831 | } |
---|
| 2832 | } |
---|
| 2833 | |
---|
| 2834 | return success; |
---|
| 2835 | } |
---|
| 2836 | |
---|
| 2837 | #if !defined(NO_CGI) |
---|
| 2838 | // This structure helps to create an environment for the spawned CGI program. |
---|
| 2839 | // Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings, |
---|
| 2840 | // last element must be NULL. |
---|
| 2841 | // However, on Windows there is a requirement that all these VARIABLE=VALUE\0 |
---|
| 2842 | // strings must reside in a contiguous buffer. The end of the buffer is |
---|
| 2843 | // marked by two '\0' characters. |
---|
| 2844 | // We satisfy both worlds: we create an envp array (which is vars), all |
---|
| 2845 | // entries are actually pointers inside buf. |
---|
| 2846 | struct cgi_env_block { |
---|
| 2847 | struct mg_connection *conn; |
---|
| 2848 | char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer |
---|
| 2849 | int len; // Space taken |
---|
| 2850 | char *vars[MAX_CGI_ENVIR_VARS]; // char **envp |
---|
| 2851 | int nvars; // Number of variables |
---|
| 2852 | }; |
---|
| 2853 | |
---|
| 2854 | // Append VARIABLE=VALUE\0 string to the buffer, and add a respective |
---|
| 2855 | // pointer into the vars array. |
---|
| 2856 | static char *addenv(struct cgi_env_block *block, const char *fmt, ...) { |
---|
| 2857 | int n, space; |
---|
| 2858 | char *added; |
---|
| 2859 | va_list ap; |
---|
| 2860 | |
---|
| 2861 | // Calculate how much space is left in the buffer |
---|
| 2862 | space = sizeof(block->buf) - block->len - 2; |
---|
| 2863 | assert(space >= 0); |
---|
| 2864 | |
---|
| 2865 | // Make a pointer to the free space int the buffer |
---|
| 2866 | added = block->buf + block->len; |
---|
| 2867 | |
---|
| 2868 | // Copy VARIABLE=VALUE\0 string into the free space |
---|
| 2869 | va_start(ap, fmt); |
---|
| 2870 | n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap); |
---|
| 2871 | va_end(ap); |
---|
| 2872 | |
---|
| 2873 | // Make sure we do not overflow buffer and the envp array |
---|
| 2874 | if (n > 0 && n < space && |
---|
| 2875 | block->nvars < (int) ARRAY_SIZE(block->vars) - 2) { |
---|
| 2876 | // Append a pointer to the added string into the envp array |
---|
| 2877 | block->vars[block->nvars++] = block->buf + block->len; |
---|
| 2878 | // Bump up used length counter. Include \0 terminator |
---|
| 2879 | block->len += n + 1; |
---|
| 2880 | } |
---|
| 2881 | |
---|
| 2882 | return added; |
---|
| 2883 | } |
---|
| 2884 | |
---|
| 2885 | static void prepare_cgi_environment(struct mg_connection *conn, |
---|
| 2886 | const char *prog, |
---|
| 2887 | struct cgi_env_block *blk) { |
---|
| 2888 | const char *s, *slash; |
---|
| 2889 | struct vec var_vec; |
---|
| 2890 | char *p, src_addr[20]; |
---|
| 2891 | int i; |
---|
| 2892 | |
---|
| 2893 | blk->len = blk->nvars = 0; |
---|
| 2894 | blk->conn = conn; |
---|
| 2895 | sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); |
---|
| 2896 | |
---|
| 2897 | addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]); |
---|
| 2898 | addenv(blk, "SERVER_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]); |
---|
| 2899 | addenv(blk, "DOCUMENT_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]); |
---|
| 2900 | |
---|
| 2901 | // Prepare the environment block |
---|
| 2902 | addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1"); |
---|
| 2903 | addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1"); |
---|
| 2904 | addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP |
---|
| 2905 | |
---|
| 2906 | // TODO(lsm): fix this for IPv6 case |
---|
| 2907 | addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.sin.sin_port)); |
---|
| 2908 | |
---|
| 2909 | addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method); |
---|
| 2910 | addenv(blk, "REMOTE_ADDR=%s", src_addr); |
---|
| 2911 | addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port); |
---|
| 2912 | addenv(blk, "REQUEST_URI=%s", conn->request_info.uri); |
---|
| 2913 | |
---|
| 2914 | // SCRIPT_NAME |
---|
| 2915 | assert(conn->request_info.uri[0] == '/'); |
---|
| 2916 | slash = strrchr(conn->request_info.uri, '/'); |
---|
| 2917 | if ((s = strrchr(prog, '/')) == NULL) |
---|
| 2918 | s = prog; |
---|
| 2919 | addenv(blk, "SCRIPT_NAME=%.*s%s", slash - conn->request_info.uri, |
---|
| 2920 | conn->request_info.uri, s); |
---|
| 2921 | |
---|
| 2922 | addenv(blk, "SCRIPT_FILENAME=%s", prog); |
---|
| 2923 | addenv(blk, "PATH_TRANSLATED=%s", prog); |
---|
| 2924 | addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on"); |
---|
| 2925 | |
---|
| 2926 | if ((s = mg_get_header(conn, "Content-Type")) != NULL) |
---|
| 2927 | addenv(blk, "CONTENT_TYPE=%s", s); |
---|
| 2928 | |
---|
| 2929 | if (conn->request_info.query_string != NULL) |
---|
| 2930 | addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string); |
---|
| 2931 | |
---|
| 2932 | if ((s = mg_get_header(conn, "Content-Length")) != NULL) |
---|
| 2933 | addenv(blk, "CONTENT_LENGTH=%s", s); |
---|
| 2934 | |
---|
| 2935 | if ((s = getenv("PATH")) != NULL) |
---|
| 2936 | addenv(blk, "PATH=%s", s); |
---|
| 2937 | |
---|
| 2938 | if (conn->path_info != NULL) { |
---|
| 2939 | addenv(blk, "PATH_INFO=%s", conn->path_info); |
---|
| 2940 | } |
---|
| 2941 | |
---|
| 2942 | #if defined(_WIN32) |
---|
| 2943 | if ((s = getenv("COMSPEC")) != NULL) { |
---|
| 2944 | addenv(blk, "COMSPEC=%s", s); |
---|
| 2945 | } |
---|
| 2946 | if ((s = getenv("SYSTEMROOT")) != NULL) { |
---|
| 2947 | addenv(blk, "SYSTEMROOT=%s", s); |
---|
| 2948 | } |
---|
| 2949 | if ((s = getenv("SystemDrive")) != NULL) { |
---|
| 2950 | addenv(blk, "SystemDrive=%s", s); |
---|
| 2951 | } |
---|
| 2952 | #else |
---|
| 2953 | if ((s = getenv("LD_LIBRARY_PATH")) != NULL) |
---|
| 2954 | addenv(blk, "LD_LIBRARY_PATH=%s", s); |
---|
| 2955 | #endif // _WIN32 |
---|
| 2956 | |
---|
| 2957 | if ((s = getenv("PERLLIB")) != NULL) |
---|
| 2958 | addenv(blk, "PERLLIB=%s", s); |
---|
| 2959 | |
---|
| 2960 | if (conn->request_info.remote_user != NULL) { |
---|
| 2961 | addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user); |
---|
| 2962 | addenv(blk, "%s", "AUTH_TYPE=Digest"); |
---|
| 2963 | } |
---|
| 2964 | |
---|
| 2965 | // Add all headers as HTTP_* variables |
---|
| 2966 | for (i = 0; i < conn->request_info.num_headers; i++) { |
---|
| 2967 | p = addenv(blk, "HTTP_%s=%s", |
---|
| 2968 | conn->request_info.http_headers[i].name, |
---|
| 2969 | conn->request_info.http_headers[i].value); |
---|
| 2970 | |
---|
| 2971 | // Convert variable name into uppercase, and change - to _ |
---|
| 2972 | for (; *p != '=' && *p != '\0'; p++) { |
---|
| 2973 | if (*p == '-') |
---|
| 2974 | *p = '_'; |
---|
| 2975 | *p = (char) toupper(* (unsigned char *) p); |
---|
| 2976 | } |
---|
| 2977 | } |
---|
| 2978 | |
---|
| 2979 | // Add user-specified variables |
---|
| 2980 | s = conn->ctx->config[CGI_ENVIRONMENT]; |
---|
| 2981 | while ((s = next_option(s, &var_vec, NULL)) != NULL) { |
---|
| 2982 | addenv(blk, "%.*s", var_vec.len, var_vec.ptr); |
---|
| 2983 | } |
---|
| 2984 | |
---|
| 2985 | blk->vars[blk->nvars++] = NULL; |
---|
| 2986 | blk->buf[blk->len++] = '\0'; |
---|
| 2987 | |
---|
| 2988 | assert(blk->nvars < (int) ARRAY_SIZE(blk->vars)); |
---|
| 2989 | assert(blk->len > 0); |
---|
| 2990 | assert(blk->len < (int) sizeof(blk->buf)); |
---|
| 2991 | } |
---|
| 2992 | |
---|
| 2993 | static void handle_cgi_request(struct mg_connection *conn, const char *prog) { |
---|
| 2994 | int headers_len, data_len, i, fd_stdin[2], fd_stdout[2]; |
---|
| 2995 | const char *status, *status_text; |
---|
| 2996 | char buf[16384], *pbuf, dir[PATH_MAX], *p; |
---|
| 2997 | struct mg_request_info ri; |
---|
| 2998 | struct cgi_env_block blk; |
---|
| 2999 | FILE *in, *out; |
---|
| 3000 | pid_t pid; |
---|
| 3001 | |
---|
| 3002 | prepare_cgi_environment(conn, prog, &blk); |
---|
| 3003 | |
---|
| 3004 | // CGI must be executed in its own directory. 'dir' must point to the |
---|
| 3005 | // directory containing executable program, 'p' must point to the |
---|
| 3006 | // executable program name relative to 'dir'. |
---|
| 3007 | (void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog); |
---|
| 3008 | if ((p = strrchr(dir, DIRSEP)) != NULL) { |
---|
| 3009 | *p++ = '\0'; |
---|
| 3010 | } else { |
---|
| 3011 | dir[0] = '.', dir[1] = '\0'; |
---|
| 3012 | p = (char *) prog; |
---|
| 3013 | } |
---|
| 3014 | |
---|
| 3015 | pid = (pid_t) -1; |
---|
| 3016 | fd_stdin[0] = fd_stdin[1] = fd_stdout[0] = fd_stdout[1] = -1; |
---|
| 3017 | in = out = NULL; |
---|
| 3018 | |
---|
| 3019 | if (pipe(fd_stdin) != 0 || pipe(fd_stdout) != 0) { |
---|
| 3020 | send_http_error(conn, 500, http_500_error, |
---|
| 3021 | "Cannot create CGI pipe: %s", strerror(ERRNO)); |
---|
| 3022 | goto done; |
---|
| 3023 | } else if ((pid = spawn_process(conn, p, blk.buf, blk.vars, |
---|
| 3024 | fd_stdin[0], fd_stdout[1], dir)) == (pid_t) -1) { |
---|
| 3025 | goto done; |
---|
| 3026 | } else if ((in = fdopen(fd_stdin[1], "wb")) == NULL || |
---|
| 3027 | (out = fdopen(fd_stdout[0], "rb")) == NULL) { |
---|
| 3028 | send_http_error(conn, 500, http_500_error, |
---|
| 3029 | "fopen: %s", strerror(ERRNO)); |
---|
| 3030 | goto done; |
---|
| 3031 | } |
---|
| 3032 | |
---|
| 3033 | setbuf(in, NULL); |
---|
| 3034 | setbuf(out, NULL); |
---|
| 3035 | |
---|
| 3036 | // spawn_process() must close those! |
---|
| 3037 | // If we don't mark them as closed, close() attempt before |
---|
| 3038 | // return from this function throws an exception on Windows. |
---|
| 3039 | // Windows does not like when closed descriptor is closed again. |
---|
| 3040 | fd_stdin[0] = fd_stdout[1] = -1; |
---|
| 3041 | |
---|
| 3042 | // Send POST data to the CGI process if needed |
---|
| 3043 | if (!strcmp(conn->request_info.request_method, "POST") && |
---|
| 3044 | !forward_body_data(conn, in, INVALID_SOCKET, NULL)) { |
---|
| 3045 | goto done; |
---|
| 3046 | } |
---|
| 3047 | |
---|
| 3048 | // Now read CGI reply into a buffer. We need to set correct |
---|
| 3049 | // status code, thus we need to see all HTTP headers first. |
---|
| 3050 | // Do not send anything back to client, until we buffer in all |
---|
| 3051 | // HTTP headers. |
---|
| 3052 | data_len = 0; |
---|
| 3053 | headers_len = read_request(out, INVALID_SOCKET, NULL, |
---|
| 3054 | buf, sizeof(buf), &data_len); |
---|
| 3055 | if (headers_len <= 0) { |
---|
| 3056 | send_http_error(conn, 500, http_500_error, |
---|
| 3057 | "CGI program sent malformed HTTP headers: [%.*s]", |
---|
| 3058 | data_len, buf); |
---|
| 3059 | goto done; |
---|
| 3060 | } |
---|
| 3061 | pbuf = buf; |
---|
| 3062 | buf[headers_len - 1] = '\0'; |
---|
| 3063 | parse_http_headers(&pbuf, &ri); |
---|
| 3064 | |
---|
| 3065 | // Make up and send the status line |
---|
| 3066 | status_text = "OK"; |
---|
| 3067 | if ((status = get_header(&ri, "Status")) != NULL) { |
---|
| 3068 | conn->request_info.status_code = atoi(status); |
---|
| 3069 | status_text = status; |
---|
| 3070 | while (isdigit(* (unsigned char *) status_text) || *status_text == ' ') { |
---|
| 3071 | status_text++; |
---|
| 3072 | } |
---|
| 3073 | } else if (get_header(&ri, "Location") != NULL) { |
---|
| 3074 | conn->request_info.status_code = 302; |
---|
| 3075 | } else { |
---|
| 3076 | conn->request_info.status_code = 200; |
---|
| 3077 | } |
---|
| 3078 | if (get_header(&ri, "Connection") != NULL && |
---|
| 3079 | !mg_strcasecmp(get_header(&ri, "Connection"), "keep-alive")) { |
---|
| 3080 | conn->must_close = 1; |
---|
| 3081 | } |
---|
| 3082 | (void) mg_printf(conn, "HTTP/1.1 %d %s\r\n", conn->request_info.status_code, |
---|
| 3083 | status_text); |
---|
| 3084 | |
---|
| 3085 | // Send headers |
---|
| 3086 | for (i = 0; i < ri.num_headers; i++) { |
---|
| 3087 | mg_printf(conn, "%s: %s\r\n", |
---|
| 3088 | ri.http_headers[i].name, ri.http_headers[i].value); |
---|
| 3089 | } |
---|
| 3090 | (void) mg_write(conn, "\r\n", 2); |
---|
| 3091 | |
---|
| 3092 | // Send chunk of data that may be read after the headers |
---|
| 3093 | conn->num_bytes_sent += mg_write(conn, buf + headers_len, |
---|
| 3094 | (size_t)(data_len - headers_len)); |
---|
| 3095 | |
---|
| 3096 | // Read the rest of CGI output and send to the client |
---|
| 3097 | send_file_data(conn, out, INT64_MAX); |
---|
| 3098 | |
---|
| 3099 | done: |
---|
| 3100 | if (pid != (pid_t) -1) { |
---|
| 3101 | kill(pid, SIGKILL); |
---|
| 3102 | } |
---|
| 3103 | if (fd_stdin[0] != -1) { |
---|
| 3104 | (void) close(fd_stdin[0]); |
---|
| 3105 | } |
---|
| 3106 | if (fd_stdout[1] != -1) { |
---|
| 3107 | (void) close(fd_stdout[1]); |
---|
| 3108 | } |
---|
| 3109 | |
---|
| 3110 | if (in != NULL) { |
---|
| 3111 | (void) fclose(in); |
---|
| 3112 | } else if (fd_stdin[1] != -1) { |
---|
| 3113 | (void) close(fd_stdin[1]); |
---|
| 3114 | } |
---|
| 3115 | |
---|
| 3116 | if (out != NULL) { |
---|
| 3117 | (void) fclose(out); |
---|
| 3118 | } else if (fd_stdout[0] != -1) { |
---|
| 3119 | (void) close(fd_stdout[0]); |
---|
| 3120 | } |
---|
| 3121 | } |
---|
| 3122 | #endif // !NO_CGI |
---|
| 3123 | |
---|
| 3124 | // For a given PUT path, create all intermediate subdirectories |
---|
| 3125 | // for given path. Return 0 if the path itself is a directory, |
---|
| 3126 | // or -1 on error, 1 if OK. |
---|
| 3127 | static int put_dir(const char *path) { |
---|
| 3128 | char buf[PATH_MAX]; |
---|
| 3129 | const char *s, *p; |
---|
| 3130 | struct mgstat st; |
---|
| 3131 | int len, res = 1; |
---|
| 3132 | |
---|
| 3133 | for (s = p = path + 2; (p = strchr(s, DIRSEP)) != NULL; s = ++p) { |
---|
| 3134 | len = p - path; |
---|
| 3135 | if (len >= (int) sizeof(buf)) { |
---|
| 3136 | res = -1; |
---|
| 3137 | break; |
---|
| 3138 | } |
---|
| 3139 | memcpy(buf, path, len); |
---|
| 3140 | buf[len] = '\0'; |
---|
| 3141 | |
---|
| 3142 | // Try to create intermediate directory |
---|
| 3143 | DEBUG_TRACE(("mkdir(%s)", buf)); |
---|
| 3144 | if (mg_stat(buf, &st) == -1 && mg_mkdir(buf, 0755) != 0) { |
---|
| 3145 | res = -1; |
---|
| 3146 | break; |
---|
| 3147 | } |
---|
| 3148 | |
---|
| 3149 | // Is path itself a directory? |
---|
| 3150 | if (p[1] == '\0') { |
---|
| 3151 | res = 0; |
---|
| 3152 | } |
---|
| 3153 | } |
---|
| 3154 | |
---|
| 3155 | return res; |
---|
| 3156 | } |
---|
| 3157 | |
---|
| 3158 | static void put_file(struct mg_connection *conn, const char *path) { |
---|
| 3159 | struct mgstat st; |
---|
| 3160 | const char *range; |
---|
| 3161 | int64_t r1, r2; |
---|
| 3162 | FILE *fp; |
---|
| 3163 | int rc; |
---|
| 3164 | |
---|
| 3165 | conn->request_info.status_code = mg_stat(path, &st) == 0 ? 200 : 201; |
---|
| 3166 | |
---|
| 3167 | if ((rc = put_dir(path)) == 0) { |
---|
| 3168 | mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->request_info.status_code); |
---|
| 3169 | } else if (rc == -1) { |
---|
| 3170 | send_http_error(conn, 500, http_500_error, |
---|
| 3171 | "put_dir(%s): %s", path, strerror(ERRNO)); |
---|
| 3172 | } else if ((fp = mg_fopen(path, "wb+")) == NULL) { |
---|
| 3173 | send_http_error(conn, 500, http_500_error, |
---|
| 3174 | "fopen(%s): %s", path, strerror(ERRNO)); |
---|
| 3175 | } else { |
---|
| 3176 | set_close_on_exec(fileno(fp)); |
---|
| 3177 | range = mg_get_header(conn, "Content-Range"); |
---|
| 3178 | r1 = r2 = 0; |
---|
| 3179 | if (range != NULL && parse_range_header(range, &r1, &r2) > 0) { |
---|
| 3180 | conn->request_info.status_code = 206; |
---|
| 3181 | // TODO(lsm): handle seek error |
---|
| 3182 | (void) fseeko(fp, (off_t) r1, SEEK_SET); |
---|
| 3183 | } |
---|
| 3184 | if (forward_body_data(conn, fp, INVALID_SOCKET, NULL)) |
---|
| 3185 | (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", |
---|
| 3186 | conn->request_info.status_code); |
---|
| 3187 | (void) fclose(fp); |
---|
| 3188 | } |
---|
| 3189 | } |
---|
| 3190 | |
---|
| 3191 | static void send_ssi_file(struct mg_connection *, const char *, FILE *, int); |
---|
| 3192 | |
---|
| 3193 | static void do_ssi_include(struct mg_connection *conn, const char *ssi, |
---|
| 3194 | char *tag, int include_level) { |
---|
| 3195 | char file_name[BUFSIZ], path[PATH_MAX], *p; |
---|
| 3196 | FILE *fp; |
---|
| 3197 | |
---|
| 3198 | // sscanf() is safe here, since send_ssi_file() also uses buffer |
---|
| 3199 | // of size BUFSIZ to get the tag. So strlen(tag) is always < BUFSIZ. |
---|
| 3200 | if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) { |
---|
| 3201 | // File name is relative to the webserver root |
---|
| 3202 | (void) mg_snprintf(conn, path, sizeof(path), "%s%c%s", |
---|
| 3203 | conn->ctx->config[DOCUMENT_ROOT], DIRSEP, file_name); |
---|
| 3204 | } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1) { |
---|
| 3205 | // File name is relative to the webserver working directory |
---|
| 3206 | // or it is absolute system path |
---|
| 3207 | (void) mg_snprintf(conn, path, sizeof(path), "%s", file_name); |
---|
| 3208 | } else if (sscanf(tag, " \"%[^\"]\"", file_name) == 1) { |
---|
| 3209 | // File name is relative to the currect document |
---|
| 3210 | (void) mg_snprintf(conn, path, sizeof(path), "%s", ssi); |
---|
| 3211 | if ((p = strrchr(path, DIRSEP)) != NULL) { |
---|
| 3212 | p[1] = '\0'; |
---|
| 3213 | } |
---|
| 3214 | (void) mg_snprintf(conn, path + strlen(path), |
---|
| 3215 | sizeof(path) - strlen(path), "%s", file_name); |
---|
| 3216 | } else { |
---|
| 3217 | cry(conn, "Bad SSI #include: [%s]", tag); |
---|
| 3218 | return; |
---|
| 3219 | } |
---|
| 3220 | |
---|
| 3221 | if ((fp = mg_fopen(path, "rb")) == NULL) { |
---|
| 3222 | cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s", |
---|
| 3223 | tag, path, strerror(ERRNO)); |
---|
| 3224 | } else { |
---|
| 3225 | set_close_on_exec(fileno(fp)); |
---|
| 3226 | if (match_prefix(conn->ctx->config[SSI_EXTENSIONS], |
---|
| 3227 | strlen(conn->ctx->config[SSI_EXTENSIONS]), path) > 0) { |
---|
| 3228 | send_ssi_file(conn, path, fp, include_level + 1); |
---|
| 3229 | } else { |
---|
| 3230 | send_file_data(conn, fp, INT64_MAX); |
---|
| 3231 | } |
---|
| 3232 | (void) fclose(fp); |
---|
| 3233 | } |
---|
| 3234 | } |
---|
| 3235 | |
---|
| 3236 | #if !defined(NO_POPEN) |
---|
| 3237 | static void do_ssi_exec(struct mg_connection *conn, char *tag) { |
---|
| 3238 | char cmd[BUFSIZ]; |
---|
| 3239 | FILE *fp; |
---|
| 3240 | |
---|
| 3241 | if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) { |
---|
| 3242 | cry(conn, "Bad SSI #exec: [%s]", tag); |
---|
| 3243 | } else if ((fp = popen(cmd, "r")) == NULL) { |
---|
| 3244 | cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO)); |
---|
| 3245 | } else { |
---|
| 3246 | send_file_data(conn, fp, INT64_MAX); |
---|
| 3247 | (void) pclose(fp); |
---|
| 3248 | } |
---|
| 3249 | } |
---|
| 3250 | #endif // !NO_POPEN |
---|
| 3251 | |
---|
| 3252 | static void send_ssi_file(struct mg_connection *conn, const char *path, |
---|
| 3253 | FILE *fp, int include_level) { |
---|
| 3254 | char buf[BUFSIZ]; |
---|
| 3255 | int ch, len, in_ssi_tag; |
---|
| 3256 | |
---|
| 3257 | if (include_level > 10) { |
---|
| 3258 | cry(conn, "SSI #include level is too deep (%s)", path); |
---|
| 3259 | return; |
---|
| 3260 | } |
---|
| 3261 | |
---|
| 3262 | in_ssi_tag = 0; |
---|
| 3263 | len = 0; |
---|
| 3264 | |
---|
| 3265 | while ((ch = fgetc(fp)) != EOF) { |
---|
| 3266 | if (in_ssi_tag && ch == '>') { |
---|
| 3267 | in_ssi_tag = 0; |
---|
| 3268 | buf[len++] = (char) ch; |
---|
| 3269 | buf[len] = '\0'; |
---|
| 3270 | assert(len <= (int) sizeof(buf)); |
---|
| 3271 | if (len < 6 || memcmp(buf, "<!--#", 5) != 0) { |
---|
| 3272 | // Not an SSI tag, pass it |
---|
| 3273 | (void) mg_write(conn, buf, (size_t)len); |
---|
| 3274 | } else { |
---|
| 3275 | if (!memcmp(buf + 5, "include", 7)) { |
---|
| 3276 | do_ssi_include(conn, path, buf + 12, include_level); |
---|
| 3277 | #if !defined(NO_POPEN) |
---|
| 3278 | } else if (!memcmp(buf + 5, "exec", 4)) { |
---|
| 3279 | do_ssi_exec(conn, buf + 9); |
---|
| 3280 | #endif // !NO_POPEN |
---|
| 3281 | } else { |
---|
| 3282 | cry(conn, "%s: unknown SSI " "command: \"%s\"", path, buf); |
---|
| 3283 | } |
---|
| 3284 | } |
---|
| 3285 | len = 0; |
---|
| 3286 | } else if (in_ssi_tag) { |
---|
| 3287 | if (len == 5 && memcmp(buf, "<!--#", 5) != 0) { |
---|
| 3288 | // Not an SSI tag |
---|
| 3289 | in_ssi_tag = 0; |
---|
| 3290 | } else if (len == (int) sizeof(buf) - 2) { |
---|
| 3291 | cry(conn, "%s: SSI tag is too large", path); |
---|
| 3292 | len = 0; |
---|
| 3293 | } |
---|
| 3294 | buf[len++] = ch & 0xff; |
---|
| 3295 | } else if (ch == '<') { |
---|
| 3296 | in_ssi_tag = 1; |
---|
| 3297 | if (len > 0) { |
---|
| 3298 | (void) mg_write(conn, buf, (size_t)len); |
---|
| 3299 | } |
---|
| 3300 | len = 0; |
---|
| 3301 | buf[len++] = ch & 0xff; |
---|
| 3302 | } else { |
---|
| 3303 | buf[len++] = ch & 0xff; |
---|
| 3304 | if (len == (int) sizeof(buf)) { |
---|
| 3305 | (void) mg_write(conn, buf, (size_t)len); |
---|
| 3306 | len = 0; |
---|
| 3307 | } |
---|
| 3308 | } |
---|
| 3309 | } |
---|
| 3310 | |
---|
| 3311 | // Send the rest of buffered data |
---|
| 3312 | if (len > 0) { |
---|
| 3313 | (void) mg_write(conn, buf, (size_t)len); |
---|
| 3314 | } |
---|
| 3315 | } |
---|
| 3316 | |
---|
| 3317 | static void handle_ssi_file_request(struct mg_connection *conn, |
---|
| 3318 | const char *path) { |
---|
| 3319 | FILE *fp; |
---|
| 3320 | |
---|
| 3321 | if ((fp = mg_fopen(path, "rb")) == NULL) { |
---|
| 3322 | send_http_error(conn, 500, http_500_error, "fopen(%s): %s", path, |
---|
| 3323 | strerror(ERRNO)); |
---|
| 3324 | } else { |
---|
| 3325 | conn->must_close = 1; |
---|
| 3326 | set_close_on_exec(fileno(fp)); |
---|
| 3327 | mg_printf(conn, "HTTP/1.1 200 OK\r\n" |
---|
| 3328 | "Content-Type: text/html\r\nConnection: %s\r\n\r\n", |
---|
| 3329 | suggest_connection_header(conn)); |
---|
| 3330 | send_ssi_file(conn, path, fp, 0); |
---|
| 3331 | (void) fclose(fp); |
---|
| 3332 | } |
---|
| 3333 | } |
---|
| 3334 | |
---|
| 3335 | static void send_options(struct mg_connection *conn) { |
---|
| 3336 | conn->request_info.status_code = 200; |
---|
| 3337 | |
---|
| 3338 | (void) mg_printf(conn, |
---|
| 3339 | "HTTP/1.1 200 OK\r\n" |
---|
| 3340 | "Allow: GET, POST, HEAD, CONNECT, PUT, DELETE, OPTIONS\r\n" |
---|
| 3341 | "DAV: 1\r\n\r\n"); |
---|
| 3342 | } |
---|
| 3343 | |
---|
| 3344 | // Writes PROPFIND properties for a collection element |
---|
| 3345 | static void print_props(struct mg_connection *conn, const char* uri, |
---|
| 3346 | struct mgstat* st) { |
---|
| 3347 | char mtime[64]; |
---|
| 3348 | gmt_time_string(mtime, sizeof(mtime), &st->mtime); |
---|
| 3349 | conn->num_bytes_sent += mg_printf(conn, |
---|
| 3350 | "<d:response>" |
---|
| 3351 | "<d:href>%s</d:href>" |
---|
| 3352 | "<d:propstat>" |
---|
| 3353 | "<d:prop>" |
---|
| 3354 | "<d:resourcetype>%s</d:resourcetype>" |
---|
| 3355 | "<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>" |
---|
| 3356 | "<d:getlastmodified>%s</d:getlastmodified>" |
---|
| 3357 | "</d:prop>" |
---|
| 3358 | "<d:status>HTTP/1.1 200 OK</d:status>" |
---|
| 3359 | "</d:propstat>" |
---|
| 3360 | "</d:response>\n", |
---|
| 3361 | uri, |
---|
| 3362 | st->is_directory ? "<d:collection/>" : "", |
---|
| 3363 | st->size, |
---|
| 3364 | mtime); |
---|
| 3365 | } |
---|
| 3366 | |
---|
| 3367 | static void print_dav_dir_entry(struct de *de, void *data) { |
---|
| 3368 | char href[PATH_MAX]; |
---|
| 3369 | struct mg_connection *conn = (struct mg_connection *) data; |
---|
| 3370 | mg_snprintf(conn, href, sizeof(href), "%s%s", |
---|
| 3371 | conn->request_info.uri, de->file_name); |
---|
| 3372 | print_props(conn, href, &de->st); |
---|
| 3373 | } |
---|
| 3374 | |
---|
| 3375 | static void handle_propfind(struct mg_connection *conn, const char* path, |
---|
| 3376 | struct mgstat* st) { |
---|
| 3377 | const char *depth = mg_get_header(conn, "Depth"); |
---|
| 3378 | |
---|
| 3379 | conn->must_close = 1; |
---|
| 3380 | conn->request_info.status_code = 207; |
---|
| 3381 | mg_printf(conn, "HTTP/1.1 207 Multi-Status\r\n" |
---|
| 3382 | "Connection: close\r\n" |
---|
| 3383 | "Content-Type: text/xml; charset=utf-8\r\n\r\n"); |
---|
| 3384 | |
---|
| 3385 | conn->num_bytes_sent += mg_printf(conn, |
---|
| 3386 | "<?xml version=\"1.0\" encoding=\"utf-8\"?>" |
---|
| 3387 | "<d:multistatus xmlns:d='DAV:'>\n"); |
---|
| 3388 | |
---|
| 3389 | // Print properties for the requested resource itself |
---|
| 3390 | print_props(conn, conn->request_info.uri, st); |
---|
| 3391 | |
---|
| 3392 | // If it is a directory, print directory entries too if Depth is not 0 |
---|
| 3393 | if (st->is_directory && |
---|
| 3394 | !mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes") && |
---|
| 3395 | (depth == NULL || strcmp(depth, "0") != 0)) { |
---|
| 3396 | scan_directory(conn, path, conn, &print_dav_dir_entry); |
---|
| 3397 | } |
---|
| 3398 | |
---|
| 3399 | conn->num_bytes_sent += mg_printf(conn, "%s\n", "</d:multistatus>"); |
---|
| 3400 | } |
---|
| 3401 | |
---|
| 3402 | // This is the heart of the Mongoose's logic. |
---|
| 3403 | // This function is called when the request is read, parsed and validated, |
---|
| 3404 | // and Mongoose must decide what action to take: serve a file, or |
---|
| 3405 | // a directory, or call embedded function, etcetera. |
---|
| 3406 | static void handle_request(struct mg_connection *conn) { |
---|
| 3407 | struct mg_request_info *ri = &conn->request_info; |
---|
| 3408 | char path[PATH_MAX]; |
---|
| 3409 | int stat_result, uri_len; |
---|
| 3410 | struct mgstat st; |
---|
| 3411 | |
---|
| 3412 | if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) { |
---|
| 3413 | * conn->request_info.query_string++ = '\0'; |
---|
| 3414 | } |
---|
| 3415 | uri_len = strlen(ri->uri); |
---|
| 3416 | url_decode(ri->uri, (size_t)uri_len, ri->uri, (size_t)(uri_len + 1), 0); |
---|
| 3417 | remove_double_dots_and_double_slashes(ri->uri); |
---|
| 3418 | stat_result = convert_uri_to_file_name(conn, path, sizeof(path), &st); |
---|
| 3419 | |
---|
| 3420 | DEBUG_TRACE(("%s", ri->uri)); |
---|
| 3421 | if (!check_authorization(conn, path)) { |
---|
| 3422 | send_authorization_request(conn); |
---|
| 3423 | } else if (call_user(conn, MG_NEW_REQUEST) != NULL) { |
---|
| 3424 | // Do nothing, callback has served the request |
---|
| 3425 | } else if (!strcmp(ri->request_method, "OPTIONS")) { |
---|
| 3426 | send_options(conn); |
---|
| 3427 | } else if (strstr(path, PASSWORDS_FILE_NAME)) { |
---|
| 3428 | // Do not allow to view passwords files |
---|
| 3429 | send_http_error(conn, 403, "Forbidden", "Access Forbidden"); |
---|
| 3430 | } else if (conn->ctx->config[DOCUMENT_ROOT] == NULL) { |
---|
| 3431 | send_http_error(conn, 404, "Not Found", "Not Found"); |
---|
| 3432 | } else if ((!strcmp(ri->request_method, "PUT") || |
---|
| 3433 | !strcmp(ri->request_method, "DELETE")) && |
---|
| 3434 | (conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL || |
---|
| 3435 | !is_authorized_for_put(conn))) { |
---|
| 3436 | send_authorization_request(conn); |
---|
| 3437 | } else if (!strcmp(ri->request_method, "PUT")) { |
---|
| 3438 | put_file(conn, path); |
---|
| 3439 | } else if (!strcmp(ri->request_method, "DELETE")) { |
---|
| 3440 | if (mg_remove(path) == 0) { |
---|
| 3441 | send_http_error(conn, 200, "OK", ""); |
---|
| 3442 | } else { |
---|
| 3443 | send_http_error(conn, 500, http_500_error, "remove(%s): %s", path, |
---|
| 3444 | strerror(ERRNO)); |
---|
| 3445 | } |
---|
| 3446 | } else if (stat_result != 0) { |
---|
| 3447 | send_http_error(conn, 404, "Not Found", "%s", "File not found"); |
---|
| 3448 | } else if (st.is_directory && ri->uri[uri_len - 1] != '/') { |
---|
| 3449 | (void) mg_printf(conn, |
---|
| 3450 | "HTTP/1.1 301 Moved Permanently\r\n" |
---|
| 3451 | "Location: %s/\r\n\r\n", ri->uri); |
---|
| 3452 | } else if (!strcmp(ri->request_method, "PROPFIND")) { |
---|
| 3453 | handle_propfind(conn, path, &st); |
---|
| 3454 | } else if (st.is_directory && |
---|
| 3455 | !substitute_index_file(conn, path, sizeof(path), &st)) { |
---|
| 3456 | if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) { |
---|
| 3457 | handle_directory_request(conn, path); |
---|
| 3458 | } else { |
---|
| 3459 | send_http_error(conn, 403, "Directory Listing Denied", |
---|
| 3460 | "Directory listing denied"); |
---|
| 3461 | } |
---|
| 3462 | #if !defined(NO_CGI) |
---|
| 3463 | } else if (match_prefix(conn->ctx->config[CGI_EXTENSIONS], |
---|
| 3464 | strlen(conn->ctx->config[CGI_EXTENSIONS]), |
---|
| 3465 | path) > 0) { |
---|
| 3466 | if (strcmp(ri->request_method, "POST") && |
---|
| 3467 | strcmp(ri->request_method, "GET")) { |
---|
| 3468 | send_http_error(conn, 501, "Not Implemented", |
---|
| 3469 | "Method %s is not implemented", ri->request_method); |
---|
| 3470 | } else { |
---|
| 3471 | handle_cgi_request(conn, path); |
---|
| 3472 | } |
---|
| 3473 | #endif // !NO_CGI |
---|
| 3474 | } else if (match_prefix(conn->ctx->config[SSI_EXTENSIONS], |
---|
| 3475 | strlen(conn->ctx->config[SSI_EXTENSIONS]), |
---|
| 3476 | path) > 0) { |
---|
| 3477 | handle_ssi_file_request(conn, path); |
---|
| 3478 | } else if (is_not_modified(conn, &st)) { |
---|
| 3479 | send_http_error(conn, 304, "Not Modified", ""); |
---|
| 3480 | } else { |
---|
| 3481 | handle_file_request(conn, path, &st); |
---|
| 3482 | } |
---|
| 3483 | } |
---|
| 3484 | |
---|
| 3485 | static void close_all_listening_sockets(struct mg_context *ctx) { |
---|
| 3486 | struct socket *sp, *tmp; |
---|
| 3487 | for (sp = ctx->listening_sockets; sp != NULL; sp = tmp) { |
---|
| 3488 | tmp = sp->next; |
---|
| 3489 | (void) closesocket(sp->sock); |
---|
| 3490 | free(sp); |
---|
| 3491 | } |
---|
| 3492 | } |
---|
| 3493 | |
---|
| 3494 | // Valid listening port specification is: [ip_address:]port[s] |
---|
| 3495 | // Examples: 80, 443s, 127.0.0.1:3128,1.2.3.4:8080s |
---|
| 3496 | // TODO(lsm): add parsing of the IPv6 address |
---|
| 3497 | static int parse_port_string(const struct vec *vec, struct socket *so) { |
---|
| 3498 | int a, b, c, d, port, len; |
---|
| 3499 | |
---|
| 3500 | // MacOS needs that. If we do not zero it, subsequent bind() will fail. |
---|
| 3501 | // Also, all-zeroes in the socket address means binding to all addresses |
---|
| 3502 | // for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT). |
---|
| 3503 | memset(so, 0, sizeof(*so)); |
---|
| 3504 | |
---|
| 3505 | if (sscanf(vec->ptr, "%d.%d.%d.%d:%d%n", &a, &b, &c, &d, &port, &len) == 5) { |
---|
| 3506 | // Bind to a specific IPv4 address |
---|
| 3507 | so->lsa.sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d); |
---|
| 3508 | } else if (sscanf(vec->ptr, "%d%n", &port, &len) != 1 || |
---|
| 3509 | len <= 0 || |
---|
| 3510 | len > (int) vec->len || |
---|
| 3511 | (vec->ptr[len] && vec->ptr[len] != 's' && vec->ptr[len] != ',')) { |
---|
| 3512 | return 0; |
---|
| 3513 | } |
---|
| 3514 | |
---|
| 3515 | so->is_ssl = vec->ptr[len] == 's'; |
---|
| 3516 | #if defined(USE_IPV6) |
---|
| 3517 | so->lsa.sin6.sin6_family = AF_INET6; |
---|
| 3518 | so->lsa.sin6.sin6_port = htons((uint16_t) port); |
---|
| 3519 | #else |
---|
| 3520 | so->lsa.sin.sin_family = AF_INET; |
---|
| 3521 | so->lsa.sin.sin_port = htons((uint16_t) port); |
---|
| 3522 | #endif |
---|
| 3523 | |
---|
| 3524 | return 1; |
---|
| 3525 | } |
---|
| 3526 | |
---|
| 3527 | static int set_ports_option(struct mg_context *ctx) { |
---|
| 3528 | const char *list = ctx->config[LISTENING_PORTS]; |
---|
| 3529 | int on = 1, success = 1; |
---|
| 3530 | SOCKET sock; |
---|
| 3531 | struct vec vec; |
---|
| 3532 | struct socket so, *listener; |
---|
| 3533 | |
---|
| 3534 | while (success && (list = next_option(list, &vec, NULL)) != NULL) { |
---|
| 3535 | if (!parse_port_string(&vec, &so)) { |
---|
| 3536 | cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s", |
---|
| 3537 | __func__, vec.len, vec.ptr, "[IP_ADDRESS:]PORT[s|p]"); |
---|
| 3538 | success = 0; |
---|
| 3539 | } else if (so.is_ssl && ctx->ssl_ctx == NULL) { |
---|
| 3540 | cry(fc(ctx), "Cannot add SSL socket, is -ssl_certificate option set?"); |
---|
| 3541 | success = 0; |
---|
| 3542 | } else if ((sock = socket(so.lsa.sa.sa_family, SOCK_STREAM, 6)) == |
---|
| 3543 | INVALID_SOCKET || |
---|
| 3544 | #if !defined(_WIN32) |
---|
| 3545 | // On Windows, SO_REUSEADDR is recommended only for |
---|
| 3546 | // broadcast UDP sockets |
---|
| 3547 | setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, |
---|
| 3548 | sizeof(on)) != 0 || |
---|
| 3549 | #endif // !_WIN32 |
---|
| 3550 | // Set TCP keep-alive. This is needed because if HTTP-level |
---|
| 3551 | // keep-alive is enabled, and client resets the connection, |
---|
| 3552 | // server won't get TCP FIN or RST and will keep the connection |
---|
| 3553 | // open forever. With TCP keep-alive, next keep-alive |
---|
| 3554 | // handshake will figure out that the client is down and |
---|
| 3555 | // will close the server end. |
---|
| 3556 | // Thanks to Igor Klopov who suggested the patch. |
---|
| 3557 | setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &on, |
---|
| 3558 | sizeof(on)) != 0 || |
---|
| 3559 | bind(sock, &so.lsa.sa, sizeof(so.lsa)) != 0 || |
---|
| 3560 | listen(sock, 100) != 0) { |
---|
| 3561 | closesocket(sock); |
---|
| 3562 | cry(fc(ctx), "%s: cannot bind to %.*s: %s", __func__, |
---|
| 3563 | vec.len, vec.ptr, strerror(ERRNO)); |
---|
| 3564 | success = 0; |
---|
| 3565 | } else if ((listener = (struct socket *) |
---|
| 3566 | calloc(1, sizeof(*listener))) == NULL) { |
---|
| 3567 | closesocket(sock); |
---|
| 3568 | cry(fc(ctx), "%s: %s", __func__, strerror(ERRNO)); |
---|
| 3569 | success = 0; |
---|
| 3570 | } else { |
---|
| 3571 | *listener = so; |
---|
| 3572 | listener->sock = sock; |
---|
| 3573 | set_close_on_exec(listener->sock); |
---|
| 3574 | listener->next = ctx->listening_sockets; |
---|
| 3575 | ctx->listening_sockets = listener; |
---|
| 3576 | } |
---|
| 3577 | } |
---|
| 3578 | |
---|
| 3579 | if (!success) { |
---|
| 3580 | close_all_listening_sockets(ctx); |
---|
| 3581 | } |
---|
| 3582 | |
---|
| 3583 | return success; |
---|
| 3584 | } |
---|
| 3585 | |
---|
| 3586 | static void log_header(const struct mg_connection *conn, const char *header, |
---|
| 3587 | FILE *fp) { |
---|
| 3588 | const char *header_value; |
---|
| 3589 | |
---|
| 3590 | if ((header_value = mg_get_header(conn, header)) == NULL) { |
---|
| 3591 | (void) fprintf(fp, "%s", " -"); |
---|
| 3592 | } else { |
---|
| 3593 | (void) fprintf(fp, " \"%s\"", header_value); |
---|
| 3594 | } |
---|
| 3595 | } |
---|
| 3596 | |
---|
| 3597 | static void log_access(const struct mg_connection *conn) { |
---|
| 3598 | const struct mg_request_info *ri; |
---|
| 3599 | FILE *fp; |
---|
| 3600 | char date[64], src_addr[20]; |
---|
| 3601 | |
---|
| 3602 | fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ? NULL : |
---|
| 3603 | mg_fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+"); |
---|
| 3604 | |
---|
| 3605 | if (fp == NULL) |
---|
| 3606 | return; |
---|
| 3607 | |
---|
| 3608 | strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z", |
---|
| 3609 | localtime(&conn->birth_time)); |
---|
| 3610 | |
---|
| 3611 | ri = &conn->request_info; |
---|
| 3612 | flockfile(fp); |
---|
| 3613 | |
---|
| 3614 | sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); |
---|
| 3615 | fprintf(fp, "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT, |
---|
| 3616 | src_addr, ri->remote_user == NULL ? "-" : ri->remote_user, date, |
---|
| 3617 | ri->request_method ? ri->request_method : "-", |
---|
| 3618 | ri->uri ? ri->uri : "-", ri->http_version, |
---|
| 3619 | conn->request_info.status_code, conn->num_bytes_sent); |
---|
| 3620 | log_header(conn, "Referer", fp); |
---|
| 3621 | log_header(conn, "User-Agent", fp); |
---|
| 3622 | fputc('\n', fp); |
---|
| 3623 | fflush(fp); |
---|
| 3624 | |
---|
| 3625 | funlockfile(fp); |
---|
| 3626 | fclose(fp); |
---|
| 3627 | } |
---|
| 3628 | |
---|
| 3629 | static int isbyte(int n) { |
---|
| 3630 | return n >= 0 && n <= 255; |
---|
| 3631 | } |
---|
| 3632 | |
---|
| 3633 | // Verify given socket address against the ACL. |
---|
| 3634 | // Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed. |
---|
| 3635 | static int check_acl(struct mg_context *ctx, const union usa *usa) { |
---|
| 3636 | int a, b, c, d, n, mask, allowed; |
---|
| 3637 | char flag; |
---|
| 3638 | uint32_t acl_subnet, acl_mask, remote_ip; |
---|
| 3639 | struct vec vec; |
---|
| 3640 | const char *list = ctx->config[ACCESS_CONTROL_LIST]; |
---|
| 3641 | |
---|
| 3642 | if (list == NULL) { |
---|
| 3643 | return 1; |
---|
| 3644 | } |
---|
| 3645 | |
---|
| 3646 | (void) memcpy(&remote_ip, &usa->sin.sin_addr, sizeof(remote_ip)); |
---|
| 3647 | |
---|
| 3648 | // If any ACL is set, deny by default |
---|
| 3649 | allowed = '-'; |
---|
| 3650 | |
---|
| 3651 | while ((list = next_option(list, &vec, NULL)) != NULL) { |
---|
| 3652 | mask = 32; |
---|
| 3653 | |
---|
| 3654 | if (sscanf(vec.ptr, "%c%d.%d.%d.%d%n", &flag, &a, &b, &c, &d, &n) != 5) { |
---|
| 3655 | cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__); |
---|
| 3656 | return -1; |
---|
| 3657 | } else if (flag != '+' && flag != '-') { |
---|
| 3658 | cry(fc(ctx), "%s: flag must be + or -: [%s]", __func__, vec.ptr); |
---|
| 3659 | return -1; |
---|
| 3660 | } else if (!isbyte(a)||!isbyte(b)||!isbyte(c)||!isbyte(d)) { |
---|
| 3661 | cry(fc(ctx), "%s: bad ip address: [%s]", __func__, vec.ptr); |
---|
| 3662 | return -1; |
---|
| 3663 | } else if (sscanf(vec.ptr + n, "/%d", &mask) == 0) { |
---|
| 3664 | // Do nothing, no mask specified |
---|
| 3665 | } else if (mask < 0 || mask > 32) { |
---|
| 3666 | cry(fc(ctx), "%s: bad subnet mask: %d [%s]", __func__, n, vec.ptr); |
---|
| 3667 | return -1; |
---|
| 3668 | } |
---|
| 3669 | |
---|
| 3670 | acl_subnet = (a << 24) | (b << 16) | (c << 8) | d; |
---|
| 3671 | acl_mask = mask ? 0xffffffffU << (32 - mask) : 0; |
---|
| 3672 | |
---|
| 3673 | if (acl_subnet == (ntohl(remote_ip) & acl_mask)) { |
---|
| 3674 | allowed = flag; |
---|
| 3675 | } |
---|
| 3676 | } |
---|
| 3677 | |
---|
| 3678 | return allowed == '+'; |
---|
| 3679 | } |
---|
| 3680 | |
---|
| 3681 | static void add_to_set(SOCKET fd, fd_set *set, int *max_fd) { |
---|
| 3682 | FD_SET(fd, set); |
---|
| 3683 | if (fd > (SOCKET) *max_fd) { |
---|
| 3684 | *max_fd = (int) fd; |
---|
| 3685 | } |
---|
| 3686 | } |
---|
| 3687 | |
---|
| 3688 | #if !defined(_WIN32) |
---|
| 3689 | static int set_uid_option(struct mg_context *ctx) { |
---|
| 3690 | struct passwd *pw; |
---|
| 3691 | const char *uid = ctx->config[RUN_AS_USER]; |
---|
| 3692 | int success = 0; |
---|
| 3693 | |
---|
| 3694 | if (uid == NULL) { |
---|
| 3695 | success = 1; |
---|
| 3696 | } else { |
---|
| 3697 | if ((pw = getpwnam(uid)) == NULL) { |
---|
| 3698 | cry(fc(ctx), "%s: unknown user [%s]", __func__, uid); |
---|
| 3699 | } else if (setgid(pw->pw_gid) == -1) { |
---|
| 3700 | cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno)); |
---|
| 3701 | } else if (setuid(pw->pw_uid) == -1) { |
---|
| 3702 | cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno)); |
---|
| 3703 | } else { |
---|
| 3704 | success = 1; |
---|
| 3705 | } |
---|
| 3706 | } |
---|
| 3707 | |
---|
| 3708 | return success; |
---|
| 3709 | } |
---|
| 3710 | #endif // !_WIN32 |
---|
| 3711 | |
---|
| 3712 | #if !defined(NO_SSL) |
---|
| 3713 | static pthread_mutex_t *ssl_mutexes; |
---|
| 3714 | |
---|
| 3715 | // Return OpenSSL error message |
---|
| 3716 | static const char *ssl_error(void) { |
---|
| 3717 | unsigned long err; |
---|
| 3718 | err = ERR_get_error(); |
---|
| 3719 | return err == 0 ? "" : ERR_error_string(err, NULL); |
---|
| 3720 | } |
---|
| 3721 | |
---|
| 3722 | static void ssl_locking_callback(int mode, int mutex_num, const char *file, |
---|
| 3723 | int line) { |
---|
| 3724 | line = 0; // Unused |
---|
| 3725 | file = NULL; // Unused |
---|
| 3726 | |
---|
| 3727 | if (mode & CRYPTO_LOCK) { |
---|
| 3728 | (void) pthread_mutex_lock(&ssl_mutexes[mutex_num]); |
---|
| 3729 | } else { |
---|
| 3730 | (void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]); |
---|
| 3731 | } |
---|
| 3732 | } |
---|
| 3733 | |
---|
| 3734 | static unsigned long ssl_id_callback(void) { |
---|
| 3735 | return (unsigned long) pthread_self(); |
---|
| 3736 | } |
---|
| 3737 | |
---|
| 3738 | #if !defined(NO_SSL_DL) |
---|
| 3739 | static int load_dll(struct mg_context *ctx, const char *dll_name, |
---|
| 3740 | struct ssl_func *sw) { |
---|
| 3741 | union {void *p; void (*fp)(void);} u; |
---|
| 3742 | void *dll_handle; |
---|
| 3743 | struct ssl_func *fp; |
---|
| 3744 | |
---|
| 3745 | if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) { |
---|
| 3746 | cry(fc(ctx), "%s: cannot load %s", __func__, dll_name); |
---|
| 3747 | return 0; |
---|
| 3748 | } |
---|
| 3749 | |
---|
| 3750 | for (fp = sw; fp->name != NULL; fp++) { |
---|
| 3751 | #ifdef _WIN32 |
---|
| 3752 | // GetProcAddress() returns pointer to function |
---|
| 3753 | u.fp = (void (*)(void)) dlsym(dll_handle, fp->name); |
---|
| 3754 | #else |
---|
| 3755 | // dlsym() on UNIX returns void *. ISO C forbids casts of data pointers to |
---|
| 3756 | // function pointers. We need to use a union to make a cast. |
---|
| 3757 | u.p = dlsym(dll_handle, fp->name); |
---|
| 3758 | #endif // _WIN32 |
---|
| 3759 | if (u.fp == NULL) { |
---|
| 3760 | cry(fc(ctx), "%s: %s: cannot find %s", __func__, dll_name, fp->name); |
---|
| 3761 | return 0; |
---|
| 3762 | } else { |
---|
| 3763 | fp->ptr = u.fp; |
---|
| 3764 | } |
---|
| 3765 | } |
---|
| 3766 | |
---|
| 3767 | return 1; |
---|
| 3768 | } |
---|
| 3769 | #endif // NO_SSL_DL |
---|
| 3770 | |
---|
| 3771 | // Dynamically load SSL library. Set up ctx->ssl_ctx pointer. |
---|
| 3772 | static int set_ssl_option(struct mg_context *ctx) { |
---|
| 3773 | struct mg_request_info request_info; |
---|
| 3774 | SSL_CTX *CTX; |
---|
| 3775 | int i, size; |
---|
| 3776 | const char *pem = ctx->config[SSL_CERTIFICATE]; |
---|
| 3777 | const char *chain = ctx->config[SSL_CHAIN_FILE]; |
---|
| 3778 | |
---|
| 3779 | if (pem == NULL) { |
---|
| 3780 | return 1; |
---|
| 3781 | } |
---|
| 3782 | |
---|
| 3783 | #if !defined(NO_SSL_DL) |
---|
| 3784 | if (!load_dll(ctx, SSL_LIB, ssl_sw) || |
---|
| 3785 | !load_dll(ctx, CRYPTO_LIB, crypto_sw)) { |
---|
| 3786 | return 0; |
---|
| 3787 | } |
---|
| 3788 | #endif // NO_SSL_DL |
---|
| 3789 | |
---|
| 3790 | // Initialize SSL crap |
---|
| 3791 | SSL_library_init(); |
---|
| 3792 | SSL_load_error_strings(); |
---|
| 3793 | |
---|
| 3794 | if ((CTX = SSL_CTX_new(SSLv23_server_method())) == NULL) { |
---|
| 3795 | cry(fc(ctx), "SSL_CTX_new error: %s", ssl_error()); |
---|
| 3796 | } else if (ctx->user_callback != NULL) { |
---|
| 3797 | memset(&request_info, 0, sizeof(request_info)); |
---|
| 3798 | request_info.user_data = ctx->user_data; |
---|
| 3799 | ctx->user_callback(MG_INIT_SSL, (struct mg_connection *) CTX, |
---|
| 3800 | &request_info); |
---|
| 3801 | } |
---|
| 3802 | |
---|
| 3803 | if (CTX != NULL && SSL_CTX_use_certificate_file(CTX, pem, |
---|
| 3804 | SSL_FILETYPE_PEM) == 0) { |
---|
| 3805 | cry(fc(ctx), "%s: cannot open %s: %s", __func__, pem, ssl_error()); |
---|
| 3806 | return 0; |
---|
| 3807 | } else if (CTX != NULL && SSL_CTX_use_PrivateKey_file(CTX, pem, |
---|
| 3808 | SSL_FILETYPE_PEM) == 0) { |
---|
| 3809 | cry(fc(ctx), "%s: cannot open %s: %s", NULL, pem, ssl_error()); |
---|
| 3810 | return 0; |
---|
| 3811 | } |
---|
| 3812 | |
---|
| 3813 | if (CTX != NULL && chain != NULL && |
---|
| 3814 | SSL_CTX_use_certificate_chain_file(CTX, chain) == 0) { |
---|
| 3815 | cry(fc(ctx), "%s: cannot open %s: %s", NULL, chain, ssl_error()); |
---|
| 3816 | return 0; |
---|
| 3817 | } |
---|
| 3818 | |
---|
| 3819 | // Initialize locking callbacks, needed for thread safety. |
---|
| 3820 | // http://www.openssl.org/support/faq.html#PROG1 |
---|
| 3821 | size = sizeof(pthread_mutex_t) * CRYPTO_num_locks(); |
---|
| 3822 | if ((ssl_mutexes = (pthread_mutex_t *) malloc((size_t)size)) == NULL) { |
---|
| 3823 | cry(fc(ctx), "%s: cannot allocate mutexes: %s", __func__, ssl_error()); |
---|
| 3824 | return 0; |
---|
| 3825 | } |
---|
| 3826 | |
---|
| 3827 | for (i = 0; i < CRYPTO_num_locks(); i++) { |
---|
| 3828 | pthread_mutex_init(&ssl_mutexes[i], NULL); |
---|
| 3829 | } |
---|
| 3830 | |
---|
| 3831 | CRYPTO_set_locking_callback(&ssl_locking_callback); |
---|
| 3832 | CRYPTO_set_id_callback(&ssl_id_callback); |
---|
| 3833 | |
---|
| 3834 | // Done with everything. Save the context. |
---|
| 3835 | ctx->ssl_ctx = CTX; |
---|
| 3836 | |
---|
| 3837 | return 1; |
---|
| 3838 | } |
---|
| 3839 | |
---|
| 3840 | static void uninitialize_ssl(struct mg_context *ctx) { |
---|
| 3841 | int i; |
---|
| 3842 | if (ctx->ssl_ctx != NULL) { |
---|
| 3843 | CRYPTO_set_locking_callback(NULL); |
---|
| 3844 | for (i = 0; i < CRYPTO_num_locks(); i++) { |
---|
| 3845 | pthread_mutex_destroy(&ssl_mutexes[i]); |
---|
| 3846 | } |
---|
| 3847 | CRYPTO_set_locking_callback(NULL); |
---|
| 3848 | CRYPTO_set_id_callback(NULL); |
---|
| 3849 | } |
---|
| 3850 | } |
---|
| 3851 | #endif // !NO_SSL |
---|
| 3852 | |
---|
| 3853 | static int set_gpass_option(struct mg_context *ctx) { |
---|
| 3854 | struct mgstat mgstat; |
---|
| 3855 | const char *path = ctx->config[GLOBAL_PASSWORDS_FILE]; |
---|
| 3856 | return path == NULL || mg_stat(path, &mgstat) == 0; |
---|
| 3857 | } |
---|
| 3858 | |
---|
| 3859 | static int set_acl_option(struct mg_context *ctx) { |
---|
| 3860 | union usa fake; |
---|
| 3861 | return check_acl(ctx, &fake) != -1; |
---|
| 3862 | } |
---|
| 3863 | |
---|
| 3864 | static void reset_per_request_attributes(struct mg_connection *conn) { |
---|
| 3865 | struct mg_request_info *ri = &conn->request_info; |
---|
| 3866 | |
---|
| 3867 | // Reset request info attributes. DO NOT TOUCH is_ssl, remote_ip, remote_port |
---|
| 3868 | ri->remote_user = ri->request_method = ri->uri = ri->http_version = |
---|
| 3869 | conn->path_info = NULL; |
---|
| 3870 | ri->num_headers = 0; |
---|
| 3871 | ri->status_code = -1; |
---|
| 3872 | |
---|
| 3873 | conn->num_bytes_sent = conn->consumed_content = 0; |
---|
| 3874 | conn->content_len = -1; |
---|
| 3875 | conn->request_len = conn->data_len = 0; |
---|
| 3876 | conn->must_close = 0; |
---|
| 3877 | } |
---|
| 3878 | |
---|
| 3879 | static void close_socket_gracefully(SOCKET sock) { |
---|
| 3880 | char buf[BUFSIZ]; |
---|
| 3881 | struct linger linger; |
---|
| 3882 | int n; |
---|
| 3883 | |
---|
| 3884 | // Set linger option to avoid socket hanging out after close. This prevent |
---|
| 3885 | // ephemeral port exhaust problem under high QPS. |
---|
| 3886 | linger.l_onoff = 1; |
---|
| 3887 | linger.l_linger = 1; |
---|
| 3888 | setsockopt(sock, SOL_SOCKET, SO_LINGER, (void *) &linger, sizeof(linger)); |
---|
| 3889 | |
---|
| 3890 | // Send FIN to the client |
---|
| 3891 | (void) shutdown(sock, SHUT_WR); |
---|
| 3892 | set_non_blocking_mode(sock); |
---|
| 3893 | |
---|
| 3894 | // Read and discard pending data. If we do not do that and close the |
---|
| 3895 | // socket, the data in the send buffer may be discarded. This |
---|
| 3896 | // behaviour is seen on Windows, when client keeps sending data |
---|
| 3897 | // when server decide to close the connection; then when client |
---|
| 3898 | // does recv() it gets no data back. |
---|
| 3899 | do { |
---|
| 3900 | n = pull(NULL, sock, NULL, buf, sizeof(buf)); |
---|
| 3901 | } while (n > 0); |
---|
| 3902 | |
---|
| 3903 | // Now we know that our FIN is ACK-ed, safe to close |
---|
| 3904 | (void) closesocket(sock); |
---|
| 3905 | } |
---|
| 3906 | |
---|
| 3907 | static void close_connection(struct mg_connection *conn) { |
---|
| 3908 | if (conn->ssl) { |
---|
| 3909 | SSL_free(conn->ssl); |
---|
| 3910 | conn->ssl = NULL; |
---|
| 3911 | } |
---|
| 3912 | |
---|
| 3913 | if (conn->client.sock != INVALID_SOCKET) { |
---|
| 3914 | close_socket_gracefully(conn->client.sock); |
---|
| 3915 | } |
---|
| 3916 | } |
---|
| 3917 | |
---|
| 3918 | static void discard_current_request_from_buffer(struct mg_connection *conn) { |
---|
| 3919 | char *buffered; |
---|
| 3920 | int buffered_len, body_len; |
---|
| 3921 | |
---|
| 3922 | buffered = conn->buf + conn->request_len; |
---|
| 3923 | buffered_len = conn->data_len - conn->request_len; |
---|
| 3924 | assert(buffered_len >= 0); |
---|
| 3925 | |
---|
| 3926 | if (conn->content_len <= 0) { |
---|
| 3927 | // Protect from negative Content-Length, too |
---|
| 3928 | body_len = 0; |
---|
| 3929 | } else if (conn->content_len < (int64_t) buffered_len) { |
---|
| 3930 | body_len = (int) conn->content_len; |
---|
| 3931 | } else { |
---|
| 3932 | body_len = buffered_len; |
---|
| 3933 | } |
---|
| 3934 | |
---|
| 3935 | conn->data_len -= conn->request_len + body_len; |
---|
| 3936 | memmove(conn->buf, conn->buf + conn->request_len + body_len, |
---|
| 3937 | (size_t) conn->data_len); |
---|
| 3938 | } |
---|
| 3939 | |
---|
| 3940 | static int is_valid_uri(const char *uri) { |
---|
| 3941 | // Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2 |
---|
| 3942 | // URI can be an asterisk (*) or should start with slash. |
---|
| 3943 | return uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0'); |
---|
| 3944 | } |
---|
| 3945 | |
---|
| 3946 | static void process_new_connection(struct mg_connection *conn) { |
---|
| 3947 | struct mg_request_info *ri = &conn->request_info; |
---|
| 3948 | int keep_alive_enabled; |
---|
| 3949 | const char *cl; |
---|
| 3950 | |
---|
| 3951 | keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes"); |
---|
| 3952 | |
---|
| 3953 | do { |
---|
| 3954 | reset_per_request_attributes(conn); |
---|
| 3955 | conn->request_len = read_request(NULL, conn->client.sock, conn->ssl, |
---|
| 3956 | conn->buf, conn->buf_size, |
---|
| 3957 | &conn->data_len); |
---|
| 3958 | assert(conn->data_len >= conn->request_len); |
---|
| 3959 | if (conn->request_len == 0 && conn->data_len == conn->buf_size) { |
---|
| 3960 | send_http_error(conn, 413, "Request Too Large", ""); |
---|
| 3961 | return; |
---|
| 3962 | } if (conn->request_len <= 0) { |
---|
| 3963 | return; // Remote end closed the connection |
---|
| 3964 | } |
---|
| 3965 | |
---|
| 3966 | // Nul-terminate the request cause parse_http_request() uses sscanf |
---|
| 3967 | conn->buf[conn->request_len - 1] = '\0'; |
---|
| 3968 | if (!parse_http_request(conn->buf, ri) || !is_valid_uri(ri->uri)) { |
---|
| 3969 | // Do not put garbage in the access log, just send it back to the client |
---|
| 3970 | send_http_error(conn, 400, "Bad Request", |
---|
| 3971 | "Cannot parse HTTP request: [%.*s]", conn->data_len, conn->buf); |
---|
| 3972 | } else if (strcmp(ri->http_version, "1.0") && |
---|
| 3973 | strcmp(ri->http_version, "1.1")) { |
---|
| 3974 | // Request seems valid, but HTTP version is strange |
---|
| 3975 | send_http_error(conn, 505, "HTTP version not supported", ""); |
---|
| 3976 | log_access(conn); |
---|
| 3977 | } else { |
---|
| 3978 | // Request is valid, handle it |
---|
| 3979 | cl = get_header(ri, "Content-Length"); |
---|
| 3980 | conn->content_len = cl == NULL ? -1 : strtoll(cl, NULL, 10); |
---|
| 3981 | conn->birth_time = time(NULL); |
---|
| 3982 | handle_request(conn); |
---|
| 3983 | call_user(conn, MG_REQUEST_COMPLETE); |
---|
| 3984 | log_access(conn); |
---|
| 3985 | discard_current_request_from_buffer(conn); |
---|
| 3986 | } |
---|
| 3987 | if (ri->remote_user != NULL) { |
---|
| 3988 | free((void *) ri->remote_user); |
---|
| 3989 | } |
---|
| 3990 | } while (conn->ctx->stop_flag == 0 && |
---|
| 3991 | keep_alive_enabled && |
---|
| 3992 | should_keep_alive(conn)); |
---|
| 3993 | } |
---|
| 3994 | |
---|
| 3995 | // Worker threads take accepted socket from the queue |
---|
| 3996 | static int consume_socket(struct mg_context *ctx, struct socket *sp) { |
---|
| 3997 | (void) pthread_mutex_lock(&ctx->mutex); |
---|
| 3998 | DEBUG_TRACE(("going idle")); |
---|
| 3999 | |
---|
| 4000 | // If the queue is empty, wait. We're idle at this point. |
---|
| 4001 | while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) { |
---|
| 4002 | pthread_cond_wait(&ctx->sq_full, &ctx->mutex); |
---|
| 4003 | } |
---|
| 4004 | |
---|
| 4005 | // If we're stopping, sq_head may be equal to sq_tail. |
---|
| 4006 | if (ctx->sq_head > ctx->sq_tail) { |
---|
| 4007 | // Copy socket from the queue and increment tail |
---|
| 4008 | *sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)]; |
---|
| 4009 | ctx->sq_tail++; |
---|
| 4010 | DEBUG_TRACE(("grabbed socket %d, going busy", sp->sock)); |
---|
| 4011 | |
---|
| 4012 | // Wrap pointers if needed |
---|
| 4013 | while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) { |
---|
| 4014 | ctx->sq_tail -= ARRAY_SIZE(ctx->queue); |
---|
| 4015 | ctx->sq_head -= ARRAY_SIZE(ctx->queue); |
---|
| 4016 | } |
---|
| 4017 | } |
---|
| 4018 | |
---|
| 4019 | (void) pthread_cond_signal(&ctx->sq_empty); |
---|
| 4020 | (void) pthread_mutex_unlock(&ctx->mutex); |
---|
| 4021 | |
---|
| 4022 | return !ctx->stop_flag; |
---|
| 4023 | } |
---|
| 4024 | |
---|
| 4025 | static void worker_thread(struct mg_context *ctx) { |
---|
| 4026 | struct mg_connection *conn; |
---|
| 4027 | int buf_size = atoi(ctx->config[MAX_REQUEST_SIZE]); |
---|
| 4028 | |
---|
| 4029 | conn = (struct mg_connection *) calloc(1, sizeof(*conn) + buf_size); |
---|
| 4030 | if (conn == NULL) { |
---|
| 4031 | cry(fc(ctx), "%s", "Cannot create new connection struct, OOM"); |
---|
| 4032 | return; |
---|
| 4033 | } |
---|
| 4034 | conn->buf_size = buf_size; |
---|
| 4035 | conn->buf = (char *) (conn + 1); |
---|
| 4036 | |
---|
| 4037 | // Call consume_socket() even when ctx->stop_flag > 0, to let it signal |
---|
| 4038 | // sq_empty condvar to wake up the master waiting in produce_socket() |
---|
| 4039 | while (consume_socket(ctx, &conn->client)) { |
---|
| 4040 | conn->birth_time = time(NULL); |
---|
| 4041 | conn->ctx = ctx; |
---|
| 4042 | |
---|
| 4043 | // Fill in IP, port info early so even if SSL setup below fails, |
---|
| 4044 | // error handler would have the corresponding info. |
---|
| 4045 | // Thanks to Johannes Winkelmann for the patch. |
---|
| 4046 | // TODO(lsm): Fix IPv6 case |
---|
| 4047 | conn->request_info.remote_port = ntohs(conn->client.rsa.sin.sin_port); |
---|
| 4048 | memcpy(&conn->request_info.remote_ip, |
---|
| 4049 | &conn->client.rsa.sin.sin_addr.s_addr, 4); |
---|
| 4050 | conn->request_info.remote_ip = ntohl(conn->request_info.remote_ip); |
---|
| 4051 | conn->request_info.is_ssl = conn->client.is_ssl; |
---|
| 4052 | |
---|
| 4053 | if (!conn->client.is_ssl || |
---|
| 4054 | (conn->client.is_ssl && sslize(conn, SSL_accept))) { |
---|
| 4055 | process_new_connection(conn); |
---|
| 4056 | } |
---|
| 4057 | |
---|
| 4058 | close_connection(conn); |
---|
| 4059 | } |
---|
| 4060 | free(conn); |
---|
| 4061 | |
---|
| 4062 | // Signal master that we're done with connection and exiting |
---|
| 4063 | (void) pthread_mutex_lock(&ctx->mutex); |
---|
| 4064 | ctx->num_threads--; |
---|
| 4065 | (void) pthread_cond_signal(&ctx->cond); |
---|
| 4066 | assert(ctx->num_threads >= 0); |
---|
| 4067 | (void) pthread_mutex_unlock(&ctx->mutex); |
---|
| 4068 | |
---|
| 4069 | DEBUG_TRACE(("exiting")); |
---|
| 4070 | } |
---|
| 4071 | |
---|
| 4072 | // Master thread adds accepted socket to a queue |
---|
| 4073 | static void produce_socket(struct mg_context *ctx, const struct socket *sp) { |
---|
| 4074 | (void) pthread_mutex_lock(&ctx->mutex); |
---|
| 4075 | |
---|
| 4076 | // If the queue is full, wait |
---|
| 4077 | while (ctx->stop_flag == 0 && |
---|
| 4078 | ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) { |
---|
| 4079 | (void) pthread_cond_wait(&ctx->sq_empty, &ctx->mutex); |
---|
| 4080 | } |
---|
| 4081 | |
---|
| 4082 | if (ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue)) { |
---|
| 4083 | // Copy socket to the queue and increment head |
---|
| 4084 | ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp; |
---|
| 4085 | ctx->sq_head++; |
---|
| 4086 | DEBUG_TRACE(("queued socket %d", sp->sock)); |
---|
| 4087 | } |
---|
| 4088 | |
---|
| 4089 | (void) pthread_cond_signal(&ctx->sq_full); |
---|
| 4090 | (void) pthread_mutex_unlock(&ctx->mutex); |
---|
| 4091 | } |
---|
| 4092 | |
---|
| 4093 | static void accept_new_connection(const struct socket *listener, |
---|
| 4094 | struct mg_context *ctx) { |
---|
| 4095 | struct socket accepted; |
---|
| 4096 | char src_addr[20]; |
---|
| 4097 | socklen_t len; |
---|
| 4098 | int allowed; |
---|
| 4099 | |
---|
| 4100 | len = sizeof(accepted.rsa); |
---|
| 4101 | accepted.lsa = listener->lsa; |
---|
| 4102 | accepted.sock = accept(listener->sock, &accepted.rsa.sa, &len); |
---|
| 4103 | if (accepted.sock != INVALID_SOCKET) { |
---|
| 4104 | allowed = check_acl(ctx, &accepted.rsa); |
---|
| 4105 | if (allowed) { |
---|
| 4106 | // Put accepted socket structure into the queue |
---|
| 4107 | DEBUG_TRACE(("accepted socket %d", accepted.sock)); |
---|
| 4108 | accepted.is_ssl = listener->is_ssl; |
---|
| 4109 | produce_socket(ctx, &accepted); |
---|
| 4110 | } else { |
---|
| 4111 | sockaddr_to_string(src_addr, sizeof(src_addr), &accepted.rsa); |
---|
| 4112 | cry(fc(ctx), "%s: %s is not allowed to connect", __func__, src_addr); |
---|
| 4113 | (void) closesocket(accepted.sock); |
---|
| 4114 | } |
---|
| 4115 | } |
---|
| 4116 | } |
---|
| 4117 | |
---|
| 4118 | static void master_thread(struct mg_context *ctx) { |
---|
| 4119 | fd_set read_set; |
---|
| 4120 | struct timeval tv; |
---|
| 4121 | struct socket *sp; |
---|
| 4122 | int max_fd; |
---|
| 4123 | |
---|
| 4124 | // Increase priority of the master thread |
---|
| 4125 | #if defined(_WIN32) |
---|
| 4126 | SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL); |
---|
| 4127 | #endif |
---|
| 4128 | |
---|
| 4129 | #if defined(ISSUE_317) |
---|
| 4130 | struct sched_param sched_param; |
---|
| 4131 | sched_param.sched_priority = sched_get_priority_max(SCHED_RR); |
---|
| 4132 | pthread_setschedparam(pthread_self(), SCHED_RR, &sched_param); |
---|
| 4133 | #endif |
---|
| 4134 | |
---|
| 4135 | while (ctx->stop_flag == 0) { |
---|
| 4136 | FD_ZERO(&read_set); |
---|
| 4137 | max_fd = -1; |
---|
| 4138 | |
---|
| 4139 | // Add listening sockets to the read set |
---|
| 4140 | for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) { |
---|
| 4141 | add_to_set(sp->sock, &read_set, &max_fd); |
---|
| 4142 | } |
---|
| 4143 | |
---|
| 4144 | tv.tv_sec = 0; |
---|
| 4145 | tv.tv_usec = 200 * 1000; |
---|
| 4146 | |
---|
| 4147 | if (select(max_fd + 1, &read_set, NULL, NULL, &tv) < 0) { |
---|
| 4148 | #ifdef _WIN32 |
---|
| 4149 | // On windows, if read_set and write_set are empty, |
---|
| 4150 | // select() returns "Invalid parameter" error |
---|
| 4151 | // (at least on my Windows XP Pro). So in this case, we sleep here. |
---|
| 4152 | mg_sleep(1000); |
---|
| 4153 | #endif // _WIN32 |
---|
| 4154 | } else { |
---|
| 4155 | for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) { |
---|
| 4156 | if (ctx->stop_flag == 0 && FD_ISSET(sp->sock, &read_set)) { |
---|
| 4157 | accept_new_connection(sp, ctx); |
---|
| 4158 | } |
---|
| 4159 | } |
---|
| 4160 | } |
---|
| 4161 | } |
---|
| 4162 | DEBUG_TRACE(("stopping workers")); |
---|
| 4163 | |
---|
| 4164 | // Stop signal received: somebody called mg_stop. Quit. |
---|
| 4165 | close_all_listening_sockets(ctx); |
---|
| 4166 | |
---|
| 4167 | // Wakeup workers that are waiting for connections to handle. |
---|
| 4168 | pthread_cond_broadcast(&ctx->sq_full); |
---|
| 4169 | |
---|
| 4170 | // Wait until all threads finish |
---|
| 4171 | (void) pthread_mutex_lock(&ctx->mutex); |
---|
| 4172 | while (ctx->num_threads > 0) { |
---|
| 4173 | (void) pthread_cond_wait(&ctx->cond, &ctx->mutex); |
---|
| 4174 | } |
---|
| 4175 | (void) pthread_mutex_unlock(&ctx->mutex); |
---|
| 4176 | |
---|
| 4177 | // All threads exited, no sync is needed. Destroy mutex and condvars |
---|
| 4178 | (void) pthread_mutex_destroy(&ctx->mutex); |
---|
| 4179 | (void) pthread_cond_destroy(&ctx->cond); |
---|
| 4180 | (void) pthread_cond_destroy(&ctx->sq_empty); |
---|
| 4181 | (void) pthread_cond_destroy(&ctx->sq_full); |
---|
| 4182 | |
---|
| 4183 | #if !defined(NO_SSL) |
---|
| 4184 | uninitialize_ssl(ctx); |
---|
| 4185 | #endif |
---|
| 4186 | |
---|
| 4187 | // Signal mg_stop() that we're done |
---|
| 4188 | ctx->stop_flag = 2; |
---|
| 4189 | |
---|
| 4190 | DEBUG_TRACE(("exiting")); |
---|
| 4191 | } |
---|
| 4192 | |
---|
| 4193 | static void free_context(struct mg_context *ctx) { |
---|
| 4194 | int i; |
---|
| 4195 | |
---|
| 4196 | // Deallocate config parameters |
---|
| 4197 | for (i = 0; i < NUM_OPTIONS; i++) { |
---|
| 4198 | if (ctx->config[i] != NULL) |
---|
| 4199 | free(ctx->config[i]); |
---|
| 4200 | } |
---|
| 4201 | |
---|
| 4202 | // Deallocate SSL context |
---|
| 4203 | if (ctx->ssl_ctx != NULL) { |
---|
| 4204 | SSL_CTX_free(ctx->ssl_ctx); |
---|
| 4205 | } |
---|
| 4206 | #ifndef NO_SSL |
---|
| 4207 | if (ssl_mutexes != NULL) { |
---|
| 4208 | free(ssl_mutexes); |
---|
| 4209 | } |
---|
| 4210 | #endif // !NO_SSL |
---|
| 4211 | |
---|
| 4212 | // Deallocate context itself |
---|
| 4213 | free(ctx); |
---|
| 4214 | } |
---|
| 4215 | |
---|
| 4216 | void mg_stop(struct mg_context *ctx) { |
---|
| 4217 | ctx->stop_flag = 1; |
---|
| 4218 | |
---|
| 4219 | // Wait until mg_fini() stops |
---|
| 4220 | while (ctx->stop_flag != 2) { |
---|
| 4221 | mg_sleep(10); |
---|
| 4222 | } |
---|
| 4223 | free_context(ctx); |
---|
| 4224 | |
---|
| 4225 | #if defined(_WIN32) && !defined(__SYMBIAN32__) |
---|
| 4226 | (void) WSACleanup(); |
---|
| 4227 | #endif // _WIN32 |
---|
| 4228 | } |
---|
| 4229 | |
---|
| 4230 | struct mg_context *mg_start(mg_callback_t user_callback, void *user_data, |
---|
| 4231 | const char **options) { |
---|
| 4232 | struct mg_context *ctx; |
---|
| 4233 | const char *name, *value, *default_value; |
---|
| 4234 | int i; |
---|
| 4235 | |
---|
| 4236 | #if defined(_WIN32) && !defined(__SYMBIAN32__) |
---|
| 4237 | WSADATA data; |
---|
| 4238 | WSAStartup(MAKEWORD(2,2), &data); |
---|
| 4239 | InitializeCriticalSection(&global_log_file_lock); |
---|
| 4240 | #endif // _WIN32 |
---|
| 4241 | |
---|
| 4242 | // Allocate context and initialize reasonable general case defaults. |
---|
| 4243 | // TODO(lsm): do proper error handling here. |
---|
| 4244 | ctx = (struct mg_context *) calloc(1, sizeof(*ctx)); |
---|
| 4245 | ctx->user_callback = user_callback; |
---|
| 4246 | ctx->user_data = user_data; |
---|
| 4247 | |
---|
| 4248 | while (options && (name = *options++) != NULL) { |
---|
| 4249 | if ((i = get_option_index(name)) == -1) { |
---|
| 4250 | cry(fc(ctx), "Invalid option: %s", name); |
---|
| 4251 | free_context(ctx); |
---|
| 4252 | return NULL; |
---|
| 4253 | } else if ((value = *options++) == NULL) { |
---|
| 4254 | cry(fc(ctx), "%s: option value cannot be NULL", name); |
---|
| 4255 | free_context(ctx); |
---|
| 4256 | return NULL; |
---|
| 4257 | } |
---|
| 4258 | if (ctx->config[i] != NULL) { |
---|
| 4259 | cry(fc(ctx), "%s: duplicate option", name); |
---|
| 4260 | } |
---|
| 4261 | ctx->config[i] = mg_strdup(value); |
---|
| 4262 | DEBUG_TRACE(("[%s] -> [%s]", name, value)); |
---|
| 4263 | } |
---|
| 4264 | |
---|
| 4265 | // Set default value if needed |
---|
| 4266 | for (i = 0; config_options[i * ENTRIES_PER_CONFIG_OPTION] != NULL; i++) { |
---|
| 4267 | default_value = config_options[i * ENTRIES_PER_CONFIG_OPTION + 2]; |
---|
| 4268 | if (ctx->config[i] == NULL && default_value != NULL) { |
---|
| 4269 | ctx->config[i] = mg_strdup(default_value); |
---|
| 4270 | DEBUG_TRACE(("Setting default: [%s] -> [%s]", |
---|
| 4271 | config_options[i * ENTRIES_PER_CONFIG_OPTION + 1], |
---|
| 4272 | default_value)); |
---|
| 4273 | } |
---|
| 4274 | } |
---|
| 4275 | |
---|
| 4276 | // NOTE(lsm): order is important here. SSL certificates must |
---|
| 4277 | // be initialized before listening ports. UID must be set last. |
---|
| 4278 | if (!set_gpass_option(ctx) || |
---|
| 4279 | #if !defined(NO_SSL) |
---|
| 4280 | !set_ssl_option(ctx) || |
---|
| 4281 | #endif |
---|
| 4282 | !set_ports_option(ctx) || |
---|
| 4283 | #if !defined(_WIN32) |
---|
| 4284 | !set_uid_option(ctx) || |
---|
| 4285 | #endif |
---|
| 4286 | !set_acl_option(ctx)) { |
---|
| 4287 | free_context(ctx); |
---|
| 4288 | return NULL; |
---|
| 4289 | } |
---|
| 4290 | |
---|
| 4291 | #if !defined(_WIN32) && !defined(__SYMBIAN32__) |
---|
| 4292 | // Ignore SIGPIPE signal, so if browser cancels the request, it |
---|
| 4293 | // won't kill the whole process. |
---|
| 4294 | (void) signal(SIGPIPE, SIG_IGN); |
---|
| 4295 | // Also ignoring SIGCHLD to let the OS to reap zombies properly. |
---|
| 4296 | (void) signal(SIGCHLD, SIG_IGN); |
---|
| 4297 | #endif // !_WIN32 |
---|
| 4298 | |
---|
| 4299 | (void) pthread_mutex_init(&ctx->mutex, NULL); |
---|
| 4300 | (void) pthread_cond_init(&ctx->cond, NULL); |
---|
| 4301 | (void) pthread_cond_init(&ctx->sq_empty, NULL); |
---|
| 4302 | (void) pthread_cond_init(&ctx->sq_full, NULL); |
---|
| 4303 | |
---|
| 4304 | // Start master (listening) thread |
---|
| 4305 | start_thread(ctx, (mg_thread_func_t) master_thread, ctx); |
---|
| 4306 | |
---|
| 4307 | // Start worker threads |
---|
| 4308 | for (i = 0; i < atoi(ctx->config[NUM_THREADS]); i++) { |
---|
| 4309 | if (start_thread(ctx, (mg_thread_func_t) worker_thread, ctx) != 0) { |
---|
| 4310 | cry(fc(ctx), "Cannot start worker thread: %d", ERRNO); |
---|
| 4311 | } else { |
---|
| 4312 | ctx->num_threads++; |
---|
| 4313 | } |
---|
| 4314 | } |
---|
| 4315 | |
---|
| 4316 | return ctx; |
---|
| 4317 | } |
---|